bitser vs pye-dog

bitser

noun
  • A mongrel dog. 

  • A bike assembled from bits and pieces. 

pye-dog

noun
  • Synonym of Indian pariah dog, a breed indigenous to India. 

  • Synonym of stray dog, particularly in Indian contexts. 

How often have the words bitser and pye-dog occurred in a corpus of books? (source: Google Ngram Viewer )