 |
| |||
| frequency of issue | |||
| periodicity schedule; periodicity | |||
| rhythmicity | |||
| frequency | |||
| recurrence | |||
| |||
| periodicity | |||
| periodicità: 38 phrases in 13 subjects |
| Agriculture | 11 |
| Communications | 1 |
| Demography | 1 |
| Education | 1 |
| Electronics | 1 |
| Finances | 8 |
| Information technology | 1 |
| Mathematics | 1 |
| Mechanic engineering | 1 |
| Medical | 5 |
| Metallurgy | 1 |
| Pharmacy and pharmacology | 1 |
| Statistics | 5 |