glad vs knee-trembling

glad

adj

  • Pleased, happy, gratified. 

noun

  • A gladiolus (plant). 

knee-trembling

adj

  • Thrilled. 

  • Very frightening. 

  • Involving a knee-trembler. 

  • Overwhelmed. 

  • Causing a feeling of rapture. 

  • Terrified. 

  • Impressive. 

How often have the words glad and knee-trembling occurred in a corpus of books? (source: Google Ngram Viewer )