disseminate vs intersperse

disseminate

verb
  • To sow and scatter principles, ideas, opinions, etc, or concrete things, for growth and propagation, like seeds. 

  • To become widespread. 

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. 

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