adopt vs sift out

adopt

verb
  • To take or receive as one's own what is not so naturally. 

  • To take voluntarily (a child of other parents) to be in the place of, or as, one's own child. 

  • To obtain (a pet) from a shelter or the wild. 

  • To take by choice into the scope of one's responsibility. 

  • To select and take or approve. 

  • To beat an opponent ten times in a row. 

sift out

verb
  • To isolate or identify one particular thing from a collection that includes less relevant things. 

How often have the words adopt and sift out occurred in a corpus of books? (source: Google Ngram Viewer )