Wodehousian vs wacko

Wodehousian

adj
  • Of or pertaining to P. G. Wodehouse (1881–1975), English writer and humorist known for his eccentric half-witted characters. 

wacko

adj
  • Amusingly eccentric or irrational. 

noun
  • An amusingly eccentric or irrational person. 

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