What is a good in-emacs process for finding emacs function names and keystrokes

Question

I am learning emacs and I think developing facility with emacs's built in help features would really smooth out the learning curve for learning keystrokes.

What is an efficient process, using emacs's built-in help functions, to find the name of a command and its keystroke?

For example, I've forgotten the key stroke for closing a frame. So I press C-h f and type in frame. I don't see any obvious candidates for the function that closes a frame, so I run a search on google.

Is there a better plan b than search google built into emacs? Alternatively, is there a better plan a than C-h f for finding the keystroke for a function whose name I cannot remember?

I've also installed helm.

Edit: All three suggestions were an improvement on my current emacs help doc search process, thanks!

Answer 1

Try apropos-command, bound to C-h a by default.

For example, C-h a frame RET shows commands containing the word frame.