sie vs sob

sie

verb
  • To sift. 

  • To strain, as milk; filter. 

  • To drop, as water; trickle. 

  • To fall, as in a swoon; faint. 

  • To sink; fall; drop. 

pron
  • Gender-neutral subject pronoun, grammatically equivalent to the gendered pronouns he and she 

noun
  • A drop. 

sob

verb
  • To soak. 

  • To say (something) while sobbing. 

  • To weep with convulsive gasps. 

noun
  • A cry with a short, sudden expulsion of breath. 

  • sound of sob 

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