Formulas for calculating the number of tasks

Dmitry
Employer

[no-member:pro]Dmitry[/no-member:pro]Dmitry

1 projects
Closed
Project parameters
Type of cooperationOne-time project
Prepaymentwithout prepayment
Payment methodsBank transfer, Electronic money
Acceptance of requestsclosed
Project description
Offering additional income on the Internet. You need to write formulas that will calculate:
1. Number of tasks per time interval with a repetition period N.
2. Checking whether the task is present at this date.

For example: water the flowers every N days or weeks or months or years from that date to another.

Input:
1) Start date
End date
(3) Repeat interval
4) Type of repetition interval: day/week/month/year

* The end date cannot be used to verify the existence of a task at the date, as it may not be
Project author: Dmitry