dissertation vs recap

dissertation

noun
  • A lengthy lecture on a subject; a treatise; a discourse; a sermon. 

  • A formal exposition of a subject, especially a research paper that students write in order to complete the requirements for a doctoral degree in the US and a non-doctoral degree in the UK; a thesis. 

recap

noun
  • A tire that has had new tread glued on. 

  • A leveraged recapitalization accomplished by increasing the debt to equity ratio. 

  • A recapitulation. 

verb
  • To replace the worn tread on a tire by gluing a new outer portion. (US English only - Retread in UK English) 

  • To seal (something) again with a cap. 

  • To recapitulate. 

  • To replace capacitors in electronic equipment. 

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