Duration

Describing some time duration is surprisingly common in feature engineering workflows. Fennel lets you express durations in an easy to read natural language as described below

Examples:

1. "7h" -> 7 hours
2. "12d" -> 12 days
3. "2y" -> 2 years
4. "3h 20m 4s" -> 3 hours 20 minutes and 4 seconds
5. "2y 4w" -> 2 years and 4 weeks

Note that there is no shortcut for month because there is a very high degree of variance in month's duration- some months are 28 days, some are 30 days and some are 31 days. A common convention in feature engineering is to use 4 weeks to describe a month.