immerge vs unite

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. 

unite

noun
  • A British gold coin worth 20 shillings, first produced during the reign of King James I, and bearing a legend indicating the king's intention of uniting the kingdoms of England and Scotland. 

verb
  • To bring together as one. 

  • To come together as one. 

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