endorse vs proselytize

endorse

verb
  • To express support or approval, especially officially or publicly. 

  • To report (a symptom); to describe. 

  • To write one's signature on the back of a cheque, or other negotiable instrument, when transferring it to a third party, or cashing it. 

  • To give an endorsement. 

noun
  • A diminutive of the pale, usually appearing in pairs on either side of a pale. 

proselytize

verb
  • To advertise one’s religious beliefs; to convert (someone) to one’s own faith or religious movement or encourage them to do so. 

  • To coerce into religious conversion. 

  • To advertise a non-religious belief, way of living, cause, point of view, (scientific) hypothesis, social or other position, political party, or other organization; to convince someone to join such a cause or organization or support such a position; to recruit someone. 

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