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| Term | ISO-8601 |
|---|---|
| Decennial | R/P10Y |
| Quadrennial | R/P4Y |
| Annual | R/P1Y |
| Bimonthly | R/P2M or R/P0.5M |
| Semiweekly | R/P3.5D |
| Daily | R/P1D |
| Biweekly | R/P2W or R/P0.5W |
| Semiannual | R/P6M |
| Biennial | R/P2Y |
| Triennial | R/P3Y |
| Three times a week | R/P0.33W |
| Three times a month | R/P0.33M |
| Continuously updated | R/PT1S |
| Monthly | R/P1M |
| Quarterly | R/P3M |
| Semimonthly | R/P0.5M |
| Three times a year | R/P4M |
| Weekly | R/P1W |
| Hourly | R/PT1H |
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