acquisition vs excerption

acquisition

noun
  • The act or process of acquiring. 

  • The process of sampling signals that measure real world physical conditions and converting these signals into digital numeric values that can be manipulated by a computer. 

  • The thing acquired or gained; a gain. 

excerption

noun
  • The act of excerpting or selecting. 

  • That which is selected or gleaned; an extract. 

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