houseless vs roofless

houseless

adj
  • lacking or in need of a house or home 

  • homeless but not wanting for local ties, affiliations or roots in a particular community. 

roofless

adj
  • Having no house or home; unsheltered. 

  • Without a roof, open to the sky. 

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