In Ohio, in 1990 and 2003 (guess why I know these dates), alimony was 3 months for every full year a couple was marries, with no alimony if a marriage ended before two full years. An ex-husband could receive alimony if the ex-wife earned more, etc.
For some odd reason, my second wife was in a big hurry to ensure divorce was final 16 days short of two years. I was just glad to end the nightmare.
However, me paying child support (50% of gross income) went on for many months after I had custody, as the bureaucracy moves slowly. Refund? No blood from a stone.
3 months for every year seems reasonable. I’d be on the hook for about $150k/yr in alimony ($275k pre tax income to me) for 9 years at the moment I’d we split (plus half the assets), even though we both agreed I’d retire in 3 years. I think the odds we divorce is fairly low fortunately but crazy things happen.