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| base period | |||
| typical period | |||
| reference period; standard period | |||
| базисный период: 18 phrases in 10 subjects |
| Advertising | 1 |
| Agriculture | 1 |
| American usage, not spelling | 1 |
| Diplomacy | 1 |
| Economy | 2 |
| Finances | 2 |
| International Monetary Fund | 3 |
| Makarov | 1 |
| Mathematics | 2 |
| Statistics | 4 |