Babel vs babbling

Babel

noun
  • A confused mixture of sounds and voices, especially in different languages. 

  • A place or scene of noise and confusion. 

  • A tall, looming structure. 

name
  • The city and tower in the land of Shinar where the confusion of languages took place, according to the Bible. 

babbling

noun
  • A confused murmur, as of a stream. 

  • a stage in child language acquisition, during which an infant appears to be experimenting with uttering sounds of language, but not yet producing any recognizable words 

  • Idle senseless talk; prattle. 

  • sounds produced by infant during the babbling period 

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