scum vs undress

scum

verb
  • To remove (something) as scum. 

  • To startscum or savescum. 

  • To remove the layer of scum from (a liquid etc.). 

  • To become covered with scum. 

noun
  • Semen. 

  • A layer of impurities that accumulates at the surface of a liquid (especially molten metal or water). 

  • A greenish water vegetation (such as algae), usually found floating on the surface of ponds 

  • A reprehensible person or persons. 

  • The topmost liquid layer of a cesspool or septic tank. 

undress

verb
  • To remove the clothing of (someone). 

  • To remove one's clothing. 

  • To remove one’s clothing. 

  • To strip of something. 

  • To take the dressing, or covering, from. 

noun
  • Partial or informal dress for women, as worn in the home rather than in public. 

  • Informal clothing for men, as opposed to formal or ceremonial wear. 

  • Now more specifically, a state of having few or no clothes on. 

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