Looking on the internet deeply has found these results:

in which is the most popular phrase on the web.

of which 1717,000,000 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:
Type, of which you spoke. But there are circumstances of which you may be unaware. That is a piece of information on Italian laws of which Mr Catania is aware, but of which many of you are not. They can afford private schools, some of which are better equipped to handle this situation. These are exactly qualities of which Joseph Messner made proof. 4 splashes, one of which was Laputa. This is a closed world of which we are responsible. Time is the substance of which I am made.	This world in which farmers starve miserably... The process in which one consciousness enters another. Condition in which evaporation always exceeds precipitation. That was the environment in which Mahayana Buddhism developed. Country in which business lines operate. free enhancement approaches can be purchased. One in which grief replaced frenzy. Thankfully in which risk

of which

1717,000,000 results on the web

in which

11,300,000,000 results on the web

More popular!

Type, of which you spoke.
But there are circumstances of which you may be unaware.
That is a piece of information on Italian laws of which Mr Catania is aware, but of which many of you are not.
They can afford private schools, some of which are better equipped to handle this situation.
These are exactly qualities of which Joseph Messner made proof.
4 splashes, one of which was Laputa.
This is a closed world of which we are responsible.
Time is the substance of which I am made.