retrofit vs send

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. 

send

verb
  • To make something (such as an object or message) go from one place to another (or to someone). 

  • To care. 

  • To make a successful ascent of a sport climbing route. 

  • To excite, delight, or thrill (someone). 

  • To dispatch an agent or messenger to convey a message or do an errand. 

  • To pitch. 

  • To bring to a certain condition. 

  • To cause to be or to happen; to bring, bring about; (archaic) to visit: (Referring to blessing or reward) To bestow; to grant. (Referring to curse or punishment) To inflict. Sometimes followed by a dependent proposition. 

noun
  • An operation in which data is transmitted. 

  • An icon (usually on a computer screen and labeled with the word "Send") on which one clicks (with a mouse or its equivalent) or taps to transmit an email or other electronic message. 

  • A messenger, especially one sent to fetch the bride. 

  • A callout or diss usually aimed at a specific person, often in the form of a diss track. 

  • A successful ascent of a sport climbing route. 

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