loose-tongued vs motormouth

loose-tongued

adj

  • garrulous, gossipy 

motormouth

verb

  • To talk very fast or incessantly. 

noun

  • One who talks very fast or incessantly; a chatty or loquacious person. 

How often have the words loose-tongued and motormouth occurred in a corpus of books? (source: Google Ngram Viewer )