It looks helpful, but I would like to paste a whole document and be told which fragments look suspicious because of low popularity. The site requires putting wildcards and completes only a single n-gram.
I did not get that from your question.
This takes parts of a sentence (i think at most 5-grams) and a few operators e.g.:
If you ask for similar words to 'much' in a fragment.
'and knows ... #much ...'
=>
and knows a lot, 3.500, 65,2%
and knows a lot about, 2.100, 39,5%
and knows a great deal, 690, 12,6%
and knows much, 630, 11,5%
and knows lots, 380, 7,1%
and knows lots of, 300, 5,5%
and knows a good deal, 100, 1,9%
and knows practically, 53, 1,0%
and knows very much, 45, 0,8%
