gush vs over-enthuse

gush

noun
  • A sudden rapid outflow. 

verb
  • To make an excessive display of enthusiasm, praise, or sentiment. 

  • To send (something) flowing forth suddenly in great volume. 

  • To ejaculate during orgasm. 

  • To flow forth suddenly, in great volume. 

over-enthuse

How often have the words gush and over-enthuse occurred in a corpus of books? (source: Google Ngram Viewer )