The phrase "pick up knowledge" is correct and usable in written English. You could use it in a sentence such as: "I'm looking forward to picking up knowledge from this course.".
It doesn't take long to pick up knowledge.
I'm just looking to pick up knowledge that I think will be the most relevant right now".
They will pick up knowledge of libel laws and of how the government works, along with some shorthand.
sites so will have little time to pick up knowledge of local business.
We kind of stumbled from adventure to adventure, picking up knowledge like found money.
"Politicians and advisers are reading blogs, picking up knowledge and in some cases changing their minds on things," he says.
Like Manchester United through the 1990s, they were picking up knowledge and experience all the time, becoming more powerful and more difficult to beat.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK