bromide vs truism

bromide

noun
  • A platitude. 

  • A binary compound of bromine and some other element or radical. 

  • A print made on bromide paper. 

  • A dose of bromide taken as a sedative, or to reduce sexual appetite. 

  • A dull person with conventional thoughts. 

truism

noun
  • A banality or cliché. 

  • A self-evident or obvious truth. 

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