chockablock vs packed

chockablock

adj
  • Jammed tightly together, jam-packed; very crowded; completely filled or stuffed. 

  • Having the blocks drawn close together so no further movement is possible, as when the tackle is hauled to the utmost. 

adv
  • In a crowded manner; as completely or closely as possible. 

packed

adj
  • Filled with a large number or large quantity of something. 

  • Filled to capacity with people. 

  • Put into a package. 

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