kitbag vs portmanteau

kitbag

noun
  • A large cylindrical holdall. 

portmanteau

adj
  • Made by combining two (or more) words, stories, etc., in the manner of a linguistic portmanteau. 

noun
  • A large travelling case usually made of leather, and opening into two equal sections. 

  • A portmanteau word. 

  • A portmanteau film. 

verb
  • To make a portmanteau word. 

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