this vs though

this

adv
  • To the degree or extent indicated. 

det
  • The (thing) here (used in indicating something or someone nearby). 

  • A known (thing) (used in first mentioning a person or thing that the speaker does not think is known to the audience). Compare with "a certain ...". 

  • The known (thing) (used in indicating something or someone just mentioned). 

  • The known (thing) (used in indicating something or someone about to be mentioned). 

  • Designates the current or next instance. 

  • Referring to oneself. 

intj
  • Indicates the speaker's strong approval or agreement with the previous material. 

noun
  • Something being indicated that is here; one of these. 

pron
  • The thing, item, etc. being indicated. 

though

adv
  • Despite that; however. 

  • Used to intensify statements or questions; indeed. 

conj
  • Despite the fact that; although. 

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