Mam vs Mam language

Mam

name
  • One’s mother. 

  • A Mayan language spoken in the Mexican state of Chiapas and the Guatemalan departments of Quetzaltenango, Huehuetenango, San Marcos, and Retalhuleu. 

Mam language

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