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| Subject | English | Russian |
| gen. | as rare as hen's teeth | днём с огнём не найти (= as scarce as hen's teeth: She acknowledged the existence of differences between men and women, but argued that the reason ‘women are as scarce as hen's teeth’ in academia is due to discrimination.  lexico.com Anglophile) |
| austral., slang | rare as hen's teeth | очень редкий |
| austral., slang | rare as hen's teeth | чрезвычайно редкий |