YOU MAY NOT CHECK MORE THAN 300 DOCUMENTS OR 150,000 WORDS IN ANY 30-DAY PERIOD OR 100 DOCUMENTS OR 50,000 WORDS IN ANY 24-HOUR PERIOD
Okay, the odds of me violating their terms are astronomical, and I assume that this is to avoid a site connecting and using it as part of their service. But, come-on folks, there needs to be an exception. Heck, I knew a professor of literature who would have violated their TOS during a single semester.
Everybody has restrictions, but this takes first place. At least until I read the next TOS.