If A occurs exactly two times, one could say "A occurs twice."
If A occurs exactly three times, one could say "A occurs thrice." etc.
Not being a native English speaker, I don't know how to properly name these words that compress the expression for "number of occurences", however, I've found articles online that have expanded their realm of existence beyond the numbers of 1, 2 and 3, such as "septence" for 7, etc.
I wonder if there are 'compression words' like this for "odd" and "even number of times". I would find these words extremely useful. There are words like that in Czech, I am however unable to find their English equivalents. Do they exist?
The Czech words for "odd" and "even" in the context of numbers are "lichý" and "sudý" respectively. The Czech language also contains a suffix representing the English standalone word "times", which is "-krát", used as in "five" = "pět" -> "five times" = "pětkrát", allowing for the words "sudokrát" and "lichokrát" (they are super scarcely used, but nonetheless legal). At another distantly related SE post, I've seen that there is a similar suffix in English, "-fold". Is this true? If it is, can you therefore use "oddfold" and "evenfold" in the manner I require, that is
"A occurs evenfold." or
"A occurs oddfold."
It doesn't seem right, but that's why I'm asking here. If this doesn't work, does a correct word for this expression exist?