indigent vs poor as a church mouse

indigent

adj

  • Poor; destitute; in need. 

noun

  • A person in need, or in poverty. 

poor as a church mouse

adj

  • Very poor, to the point of starving or begging; utterly destitute. 

How often have the words indigent and poor as a church mouse occurred in a corpus of books? (source: Google Ngram Viewer )