We like to help when we can, but for questions such as these, you can find the answers yourself very quickly in OneLook: General dictionary sites
Student or Learner
is chockage a word in English? what are the synonyms of the word blockage ?
this, What I mean is that the writer may have coined 'chockage' as meaning something like 'blockage' because of the word 'choc-a-bloc'. If so, it's quite amusing but not idiomatic.