Constant vs Merry

Constant

name
  • A male given name from Latin, feminine equivalent Constance 

  • A surname. 

  • A locality in Saint George parish, Barbados. 

Merry

name
  • A female given name from English from the adjective, also a diminutive of Mercy. 

  • A surname transferred from the nickname. Originally a nickname for a merry person. 

  • A diminutive of the male given name Meredith. 

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