How can I calculate How many years, days, or months in specific time range

For a date time calculator tool, I want to fetch How many Years, Months, Weeks, Days, Hours, Minutes, and seconds are there in given time range let's say I am calculating 9 Months Ago from now and I want to display How many Years, Months, Weeks, Days, Hours, Minutes, and seconds are there in 9 months separately?

This seems more to be a question you can ask in stackoverflow

Such "questions" with links to question-affiliated sites reek of spam and clickbait. As such questions have NOTHING to do with Heidi (or databases in general) I would classify them as spam and simply remove them.

Yes, that's what I was thinking as well, but I was unsure. I just deleted the link in the above post.