immerge vs synthesize

immerge

verb
  • To plunge into, under, or within anything, especially a fluid; to dip; to immerse. 

  • To disappear by entering into any medium, as a star into the light of the sun. 

synthesize

verb
  • To be combined producing a new, more complex product. 

  • To produce a substance by chemical synthesis. 

  • To combine two or more things to produce a new product. 

  • To be produced by chemical synthesis. 

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