penurious vs poor as a rat

penurious

adj
  • Impoverished; wanting for money. 

  • Miserly; excessively cheap. 

  • Not bountiful; thin; scant. 

poor as a rat

adj
  • Synonym of poor as a church mouse 

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