smut vs wet rot

smut

noun
  • Any of a range of fungi, mostly Ustilaginomycetes, that cause plant disease in grasses, including cereal crops; the disease so caused. 

  • Bad, soft coal containing earthy matter, found in the immediate locality of faults. 

  • Obscene language; ribaldry; obscenity. 

  • A flake of ash or soot. 

  • Soot. 

  • Sexually vulgar material; something that is sexual in a dirty way; pornographic material. 

verb
  • To stain (or be stained) with soot or other dirt. 

  • To clear of the smut fungus. 

  • To taint (grain, etc.) with the smut fungus. 

  • To become tainted by the smut fungus. 

wet rot

noun
  • Decay of timber by fungi that attack wood having high moisture content. 

  • A soft rot in which the decayed tissues are markedly watery. 

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