Vim - Delete til last occurrence of character in line

I'm trying to figure out how to dt or df the last occurrence of a character in a string.

For example, let's say I have the following line:

foo not.relevant.text.bar

If I f df. I expectedly get foo relevant.text.bar but I would like to get foo bar. Using f 3df. is not an option as I don't know how many of that character will be in the string. Additionally, I may want to get foo .bar (f 3dt.), or if the line ends with a dot, I may want to get foo .. I want to always find the last one regardless of how many there are.

Is this possible without a regex? I suppose I could use a regex but I was hoping there was a simple vim command that I'm missing. I find myself trying to do something like this often.

You can use my JumpToLastOccurrence plugin. It provides ,f / ,F / ,t / ,T commands that do just that.