memorial vs testimonial

memorial

noun
  • A service of remembrance or commemoration. 

  • Something, such as a monument, by which someone or something is remembered. 

  • A chronicle or memoir. 

  • A statement of facts set out in the form of a petition to a person in authority, a court or tribunal, a government, etc. 

adj
  • Serving as a remembrance of someone or something; commemorative. 

  • Contained in the memory. 

testimonial

noun
  • A tribute given in appreciation of someone's service etc. 

  • A statement, especially one given under oath; testimony 

  • A match played in tribute to a particular player (who sometimes receives a proportion of the gate money). 

  • A written recommendation of someone's worth or character 

adj
  • Serving as testimony. 

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