blitz vs downgrade

blitz

verb
  • To perform a blitz. 

  • To do something quickly or in one session. 

  • To attack quickly or suddenly, as by an air raid or similar action. 

  • To purée or chop (food products) using a food processor or blender. 

noun
  • The act of blending or puréeing food using a blender or processor. 

  • A play in which additional defenders beyond the defensive linemen rush the passer. 

  • A swift and overwhelming attack or effort. 

  • A sudden attack, especially an air raid; usually with reference to the Blitz. 

downgrade

verb
  • To disparage. 

  • to reduce the official estimate of a storm's intensity. 

  • To reduce in complexity, or remove unnecessary parts; to dumb down. 

  • To place lower in position. 

  • To revert software back to an older version. 

noun
  • A reduction of a rating, as a financial or credit rating. 

  • A downhill gradient on a road or railway. 

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