Looking on the internet deeply has found these results:

in which is the most popular phrase on the web.

on which 18,500,000 results on the web	in which 11,300,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Jun 28, 2011 ... The use of either preposition implies the figurative sense of a computer as a " platform" on which work can be done, documents can be placed, ... when / on which. On which is sometimes used as a more precise sounding alternative to when to introduce relative clauses after nouns referring to time: The day ... "on which" en español. Mándanos un mensaje para informarnos que esta traducción hace falta. Normalmente la incluiremos en las próximas 24 horas. También ... Can We Guess Your Age Based On Which Cat You Pick? We know how old you are right meow. posted on Jul. 8, 2015, at 6:25 a.m.. Loryn Brantz. BuzzFeed ...	Condition in which evaporation always exceeds precipitation. One in which grief replaced frenzy. Thankfully in which risk That was the environment in which Mahayana Buddhism developed. Country in which business lines operate. The process in which one consciousness enters another. This world in which farmers starve miserably... free enhancement approaches can be purchased.

on which

18,500,000 results on the web

in which

11,300,000,000 results on the web

More popular!

Jun 28, 2011 ... The use of either preposition implies the figurative sense of a computer as a " platform" on which work can be done, documents can be placed, ...
when / on which. On which is sometimes used as a more precise sounding alternative to when to introduce relative clauses after nouns referring to time: The day ...
"on which" en español. Mándanos un mensaje para informarnos que esta traducción hace falta. Normalmente la incluiremos en las próximas 24 horas. También ...
Can We Guess Your Age Based On Which Cat You Pick? We know how old you are right meow. posted on Jul. 8, 2015, at 6:25 a.m.. Loryn Brantz. BuzzFeed ...