conform vs retrofit

conform

verb
  • To make similar in form or nature; to make suitable for a purpose; to adapt. 

  • To act in accordance with expectations; to behave in the manner of others, especially as a result of social pressure. 

  • To be in accordance with a set of specifications or regulations, or with a policy or guideline. 

retrofit

verb
  • To give new characteristics or make alterations (to someone or something) to suit them to changed circumstances. 

  • To supply (a device, structure, etc.) with new components or parts that were not previously available or installed; to modernize. 

  • Synonym of backport (“to retroactively supply a fix or feature to a previous version of a software product at the same time or after supplying it to the current version.”) 

  • To supply a device, structure, etc., with new components or parts that were not previously available or installed. 

  • To add or substitute (new components or parts) that were not previously available for or installed in a device, structure, etc. 

noun
  • An act of supplying a device, structure, etc., with new components or parts that were not previously available or installed; a retrofitting. 

  • A change made to a device, structure, etc., by introducing components or parts that were not previously available or installed. 

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