assertion vs phrasal verb

assertion

noun
  • Something which is asserted; a declaration; a statement asserted. 

  • A statement in a program asserting a condition expected to be true at a particular point, used in debugging. 

  • A statement or declaration which lacks support or evidence. 

  • The act of asserting; positive declaration or averment. 

  • Maintenance; vindication 

phrasal verb

noun
  • A phrase, consisting of a verb and either or both of a preposition or adverb, that has idiomatic meaning. 

  • A two-word verb, consisting of a verb and a "small" adverb or particle, that has an idiomatic meaning not easily predictable from the individual parts. 

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