We're mostly following smep, but I've modified it slightly LoL.
SMEP says to bd every second day, starting on CD 8. Then when you get a positive opk you bd every day for 3 days, skip one day, then once more for luck.
We started on CD 5, and are doing odd days. So we bd'd CD 5, 7 and 9 and 11 so far.
We almost always bd in the mornings, so this month I'm switching it up. CD 5 and 7 were in the mornings, so 48 hours apart. CD 9 was late at night, almost midnight, then CD 11 was morning, so 36 hours apart. Then we'll bd again tonight, CD 12, which will again be 36 hours apart. (so every 1.5 days). We'll continue the 36 hour gaps until I get my smiley face and then every night for 3 nights.
I'm so scared of missing it that's why i've narrowed the gap to every 36 hours rather than 48 now that I think I'm approaching ov.
So CD 5 and 7 were just in case, but not really counting towards baby-making.
Then CD 9, 11, 12 etc are 36 hours apart, every 1.5 days.
After positive opk it'll be every 24 hours.