wo vs woo

wo

intj
  • A call to cause a horse to slow down or stop; whoa. 

  • A falconer's call to a hawk. 

noun
  • A wall. 

woo

intj
  • Expressing joy or excitement; woohoo, yahoo. 

verb
  • To endeavor to gain someone's support. 

  • To court solicitously; to invite with importunity. 

  • (often of a man) To try to persuade (someone) to be in an amorous relationship with 

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