collectanea vs corpus

collectanea

noun
  • A selective collection of passages from various sources or by various authors; an anthology. 

corpus

noun
  • A collection of writings, often on a specific topic, of a specific genre, from a specific demographic or a particular author, etc. 

  • Such a collection in form of an electronic database used for linguistic analyses. 

  • A body, a collection. 

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