knee-trembling vs sick-ass

knee-trembling

adj

  • Impressive. 

  • Very frightening. 

  • Involving a knee-trembler. 

  • Overwhelmed. 

  • Causing a feeling of rapture. 

  • Thrilled. 

  • Terrified. 

sick-ass

adj

  • Impressive. 

  • Mentally disturbed or unsound; malevolently crazy. 

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