noddy vs pinhead

noddy

noun
  • A stupid or silly person. 

  • Any of several stout-bodied, gregarious terns of the genera Anous and Procelsterna, found in tropical seas. 

  • An inverted pendulum consisting of a short vertical flat spring which supports a rod having a bob at the top; used for detecting and measuring slight horizontal vibrations of a body to which it is attached. 

  • A cutaway scene of a television interviewer nodding, used to cover an editing gap in an interview. 

pinhead

noun
  • A foolish or stupid person. 

  • The head of a pin. (Frequently used in size comparisons.) 

  • A telemark skier. 

  • A newborn cricket used as food for pets. 

  • A human head that is unusually tapered or small, often due to microcephaly, or a person with that trait. Often promoted in freak shows as "human pinheads". 

  • The immature juvenile fruiting body of a mushroom prior to its gills opening. 

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