OPK 1x or 2x daily?

Caitlin • Mama to 2 sweet little girls 🎀🎀 & an angel baby 👼🏼 - PCOS - Hopeful for #3 🤍

Was wondering if you ladies OPK once or twice daily. I’ve only been doing once most days (and didn’t test at all on CD 14) and now I’m wondering if I may have missed my peak that way. CD 19 and so far only negatives CD 9 through now 🙄 Hubby and I have been pretty much BD-ing daily not to miss my O though!