retrofit vs turn around

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. 

turn around

verb
  • To change drastically in a fundamental way, often for the better; to change to the opposite (opinion or position). 

  • To consider from a different viewpoint. 

  • (often with a unit of time) To produce; to output; to generate. 

  • To suddenly change or reverse one's opinion, point of view, stated position, behaviour, etc. 

  • To reverse an expected outcome (of a game, etc.), usually from a losing outcome to a winning one; to return (a business, department, etc.) to effectiveness, profitability, etc. 

  • To physically rotate (usually around a vertical axis) for a half turn (180 degrees), a whole turn (360 degrees), or an indefinite amount. 

  • To convert (an agent) to work for one's own side. 

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