Mam vs Oma

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. 

Oma

name
  • A female given name 

  • A town in Iron County, Wisconsin, United States. 

  • A township in Gêrzê County, Ngari, Tibet Autonomous Region, China. 

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