Formulas for calculating the number of tasks

Дмитрий
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Дмитрий

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Project title: Formulas for calculating the number of tasks
Type of cooperation: One-time project
Section: Education and consulting
Prepayment: without prepayment
Payment methods: Bank transfer, Electronic money
Acceptance of requests: closed

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
Дмитрий