intersperse vs send off

intersperse

verb
  • To scatter or insert something into or among other things. 

  • To diversify by placing or inserting other things among something. 

  • To mix two things irregularly, placing things of one kind among things of other. 

send off

verb
  • To emit; to emanate. 

  • To show someone a red card, and dismiss them from the playing area. 

  • To provide a celebration for someone who is leaving; give a sendoff. 

  • To send; to dispatch. 

noun
  • farewell party 

  • funeral or memorial service 

How often have the words intersperse and send off occurred in a corpus of books? (source: Google Ngram Viewer )