This is the 2011th most frequent Russian word.
учений
"Учений" means "scholar" or "scientist" in English.
Here, "учёный" is used to denote a "scientist," highlighting a person engaged in scientific research.
Учёный представил свои исследования на конференции.
The scientist presented his research at the conference.
In this context, "учений" refers to "studies" or "teachings," indicating the process or body of knowledge being referred to.
Много учений и практики приводят к мастерству.
Much learning and practice lead to mastery.
Here, "учениях" (the plural prepositional case of "учение") indicates systems of thought or doctrines, pertaining to knowledge.