mither vs piss and moan

mither

verb

  • To make an unnecessary fuss, moan, bother. 

  • To pester or irritate someone. 

noun

  • mother 

piss and moan

verb

  • To complain, especially needlessly and loudly. 

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