himself vs hirself

himself

pron
  • Him; the male object of a verb or preposition that also appears as the subject 

  • He; used as an intensifier, often to emphasize that the referent is the exclusive participant in the predicate 

  • The subject or non-reflexive object of a predicate; he himself. 

  • The subject or non-reflexive object of a predicate; he (used of upper-class gentlemen, or sarcastically, of men who imagine themselves to be more important than others) 

hirself

pron
  • Hir, themself; gender-neutral third-person singular object of a verb or preposition that also appears as the subject, coordinate with gendered himself and herself. 

  • Sie; an intensive repetition of a gender-neutral subject, often used to indicate exclusiveness of that person as the only satisfier of a predicate. 

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