indoor baseball vs town ball

indoor baseball

noun
  • A form of baseball, played in a gymnasium or similar venue, using a soft ball. 

town ball

noun
  • A non-varsity softball team, typically played by youths (usually girls) under the age of 18. Frequently played in small cities and towns, sponsored by a local business and coached by volunteers. 

How often have the words indoor baseball and town ball occurred in a corpus of books? (source: Google Ngram Viewer )