fixing vs massing

fixing

noun
  • See fixings. 

  • The act of subverting (fixing) a vote. 

  • Something to aid attachment during construction (screws, wall plugs, etc) 

verb
  • Going; preparing; ready. Only used in fixing to. 

massing

noun
  • A bringing together into a mass. 

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