pick up vs retrofit

pick up

verb
  • To point out the behaviour, habits, or actions of (a person) in a critical manner; used with on. 

  • To acquire (something) accidentally; to catch (a disease). 

  • To collect and detain (a suspect). 

  • To lift; to grasp and raise. 

  • To clean up; to return to an organized state. 

  • To meet and seduce somebody for romantic purposes, especially in a social situation. 

  • To receive calls; to function correctly. 

  • To record; to notch up. 

  • To learn, to grasp; to begin to understand; to realize. 

  • To promote somebody who was previously passed over. 

  • To collect an object, especially in passing. 

  • To answer a telephone. 

  • To take control (physically) of something. 

  • To mark, to defend against an opposition player by following them closely. 

  • To behave in a manner that results in a foul. 

  • To restart or resume. 

  • To receive (a radio signal or the like). 

  • To notice, detect or discern; to pick up on 

  • To improve, increase, or speed up. 

  • To reduce the despondency of. 

  • To pay for. 

  • To obtain and publish a story, news item, etc. 

  • To collect a passenger. 

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 pick up and retrofit occurred in a corpus of books? (source: Google Ngram Viewer )