glean vs settle upon

glean

noun
  • A collection made by gleaning. 

verb
  • To collect what is left behind (grain, grapes, etc.) after the main harvest or gathering. 

  • To gather information in small amounts, with implied difficulty, bit by bit. 

  • To gather what is left in (a field or vineyard). 

  • To frugally accumulate resources from low-yield contexts. 

settle upon

verb
  • Synonym of settle on 

How often have the words glean and settle upon occurred in a corpus of books? (source: Google Ngram Viewer )