smatter vs talk to oneself

smatter

verb
  • To talk superficially; to babble, chatter. 

  • To speak (a language) with spotty or superficial knowledge. 

  • To study or approach superficially; to dabble in. 

  • To have a slight taste, or a slight, superficial knowledge, of anything; to smack. 

noun
  • A smattering (small number or amount). 

  • A smattering (superficial knowledge). 

talk to oneself

verb
  • To say one's thoughts aloud, particularly while also not conversing with anyone else. 

How often have the words smatter and talk to oneself occurred in a corpus of books? (source: Google Ngram Viewer )