public speaking vs speech

public speaking

noun
  • act of speaking to a group of people in a structured manner 

  • oratory (art of public speaking) 

speech

noun
  • The act of speaking, a certain style of it. 

  • The ability to speak; the faculty of uttering words or articulate sounds and vocalizations to communicate. 

  • A formal session of speaking, especially a long oral message given publicly by one person. 

  • Language used orally, rather than in writing. 

  • An utterance that is quoted; see direct speech, reported speech 

  • Public talk, news, gossip, rumour. 

  • A dialect, vernacular, or (dated) a language. 

verb
  • To make a speech; to harangue. 

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