Recommendations

First of all, it's in the same series and therefore has the same concept. Reply 1994 was just as big as 1988 in Korea when it first came out. It's hilarious and has the love triangle that is present in all three Reply dramas.

It's a story about friendship just like hospital playlist.....even though other story lines are different.... Both dramas are soo good and too relaxing and comforting drama's

Both dramas are about solving cases by finding the cause or disease (DF - Psychology , GQ - Rare diseases during Autopsy)
Both are of the same channel OCN
Both dramas have suspense, thriller & serial killer in between
Both ML has a past which they don't share to others easily
Both ML are well known genius at very young age in their professional fields
If you liked Dr Frost I strongly suggest to watch God's Quiz which has total 5 Season episodes

Genre of story quite similiar: Historical, forbiden love of noble figure, political, intrigue , tragic.

Both are:
-set in early 2000's
-the main female lead is the same in both dramas, the second male lead in Meteor garden is the main lead in Mars
-romance is involved

Both beautiful chef historical. Chef Hua is more food focused. ML both know kung fu.
Showing historical kitchens and cooking.

has a similar story about a game company, the male lead is also a CEO. the main male lead is also played by the same actor

HiGH&LOW THE MOVIE 2 / END OF SKY (2017) is the third movie in the series; HiGH&LOW. And HiGH&LOW THE MOVIE 3 / FINAL MISSION (2017) is the fourth movie in the film franchise. Both movies feature insane all-gang battles. Highlighting all five S.W.O.R.D. gangs and the Amamiya brothers.

HiGH&LOW: The Red Rain (2016) is the second movie in order to watch in the series; HiGH&LOW. And HiGH&LOW THE MOVIE 3 / FINAL MISSION (2017) is the fourth movie in order to watch. Both movies feature insane all-gang battles. Highlighting all five S.W.O.R.D. gangs and the Amamiya brothers.

HiGH&LOW: The Red Rain (2016) is the second movie in the series; HiGH&LOW in order to watch. And HiGH&LOW THE MOVIE 2 / END OF SKY (2017) is the third film in order to watch. Both movies feature insane all-gang battles. Highlighting all five S.W.O.R.D. gangs and the Amamiya brothers.

HiGH&LOW THE MOVIE (2016) is the first movie in the series; HiGH&LOW. And HiGH&LOW THE MOVIE 3 / FINAL MISSION (2017) is the fourth movie in order to watch. Both movies feature insane all-gang battles. Highlighting all five S.W.O.R.D. gangs and the Amamiya brothers.

HiGH&LOW THE MOVIE (2016) is the first movie in the series; HiGH&LOW. And HiGH&LOW THE MOVIE 2 / END OF SKY (2017) is the third movie in order to watch. Both movies feature insane all-gang battles. Highlighting all five S.W.O.R.D. gangs and the Amamiya brothers.

HiGH&LOW THE MOVIE (2016) is the first movie in the series; HiGH&LOW. And HiGH&LOW THE RED RAIN (2016) is the second movie in order to watch of the same series. Both movies feature insane all-gang battles. Highlighting all five S.W.O.R.D. gangs and the Amamiya brothers.

Both are very well made noona dramas.

Both dramas show capable, independent, single career women in their 30s navigate work and life issues. They are slowly taken out of their shell and gradually made to put down their guards by their love interests who happen to be young men in their twenties. The men are mature despite their young age.

Both dramas have a well written, properly fleshed out female characters, supportive partners, and a decently paced romance.

Sequel to Shino Yuzuru and Seiryo Toji dating. Covering the other days of that same week. Both movies should be watched back to back.