Central America vs Mesoamerica

Central America

name

  • The part of continental North America which lies between Mexico and South America. 

noun

  • Central America 

Mesoamerica

name

  • A pre-Columbian cultural region extending from the southern part of Mexico to an area that comprises some parts of the countries of Central America 

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