Looks to me like there is no “simple” drop down to select for it, but checkout this post about “nesting” your time conditions
For example
Create one time condition to match the first Monday for example, if it matches do this, if it doesnt match, send to second condition
Second condition
If it matches the 3rd monday do this, if not go to time condition 3
Time condition 3 (everything else)
If it matches (meaning it is not the 1st or 3rd monday) do this (go to queue for example)
Else, do that (go to ivr for example)
Would be nice if there was a “every other” option, but its still workable