touch base vs unite

touch base

verb
  • To meet or make contact with someone, usually to consult, review, visit, or communicate. 

  • To touch a base, usually with a foot but sometimes with a hand. 

unite

verb
  • To come together as one. 

  • To bring together as one. 

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. 

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