do up vs improve

do up

verb
  • To fasten (a piece of clothing, etc.); to tighten (a nut etc.) 

  • To beat up; to physically assault. 

  • To execute a task or performance. 

  • To pack together and envelop; to pack up. 

  • To redecorate (a room, etc.); to make improvements to a home or domestic property. 

improve

verb
  • To make (something) better; to increase the value or productivity (of something). 

  • To become better. 

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