http://digital.bg/google-%D0%BF%D0%BE%D0%BB%D0%B7%D0%B2%D0%B0-%D1%80%D0%B0%D0%B7%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D0%BA%D0%B0-%D1%81%D1%8A%D0%B7%D0%B4%D0%B0%D0%B4%D0%B5%D0%BD%D0%B0-%D0%B7%D0%B0-nasa--nnno10164.html has been crawled 3 times going all the way back to May 2, 2010.

A crawl can be a duplicate of the last one. It happens about 25% of the time across 420,000,000 websites. FAQ
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Note

This calendar view maps the number of times http://digital.bg/google-%D0%BF%D0%BE%D0%BB%D0%B7%D0%B2%D0%B0-%D1%80%D0%B0%D0%B7%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D0%BA%D0%B0-%D1%81%D1%8A%D0%B7%D0%B4%D0%B0%D0%B4%D0%B5%D0%BD%D0%B0-%D0%B7%D0%B0-nasa--nnno10164.html was crawled by the Wayback Machine, not how many times the site was actually updated. More info in the FAQ.