purely vs solus

purely

adj
  • without physical adulterants; with no admixture 

adv
  • Chastely, innocently; in a sinless manner, without fault. 

  • Wholly; really, completely. 

  • Solely; exclusively; merely, simply. 

solus

adj
  • alone, unaccompanied (as a stage direction) 

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