pick out vs sift out

pick out

verb
  • to remove by picking 

  • to select 

  • to send a long pass or cross to. 

  • to distinguish; discern 

  • To ornament or relieve with lines etc. of a different, usually lighter, colour. 

  • to detect using one's senses (sight, smell, hearing, touch, taste) 

sift out

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

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