Constant vs Oral

Constant

name

  • A male given name from Latin, feminine equivalent Constance 

  • A surname. 

  • A locality in Saint George parish, Barbados. 

Oral

name

  • A male given name from Latin of American usage 

  • A city in Kazakhstan 

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