myself vs yourself

myself

pron
  • Personally, for my part; used in apposition to I, sometimes for simple emphasis and sometimes with implicit exclusion of any others performing the activity described. 

  • Me (as the object of a verb or preposition). 

  • In my normal state of body or mind. 

  • Me, as direct or indirect object the speaker as the object of a verb or preposition, when the speaker is also the subject. 

  • my name is... 

yourself

pron
  • You (singular); used emphatically, especially to indicate exclusiveness of the referent's participation in the predicate, i.e., that no one else is involved. 

  • Your own self (singular). 

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