ipse dixit vs memo

ipse dixit

noun
  • An authority who makes such an assertion. 

  • A dogmatic and unproved proposition or dictum that is accepted solely on the authority of someone who is known to have asserted it. 

memo

noun
  • A short note; a memorandum. 

  • A record of partial results that can be reused later without recomputation. 

verb
  • To record something; to make a note of something. 

  • To send someone a note about something, for the record. 

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