immerge vs impregnate

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. 

impregnate

verb
  • To fill pores or spaces with a substance. 

  • To saturate, or infuse. 

  • To fertilize. 

  • To cause to become pregnant. 

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