This probably won't help you, but I'm pretty inconsistent when it comes to PT or DT's. I was doing them about once every 7-10 days and my hair loved it but somewhere along the way I got busy, distracted, lazy....and now just do them when I think about it. I kinda go according to how my hair feels.

When im consistent, I like to do atleast a DT once a week and a protein maybe every 10 days. I do use products and conditioners with protein so don't do PT's that often. This reminds me I need to purchase some CJ Repair me, I've heard great things about it. Sometimes instead of a DT I do a heavy oiling with either coconut oil or EVOO. I slather my hair and let it sit for about an hour and then wash as normal. My hair loves it!
3a (normal-porosity/elasticity/density)
Cleanse: CHS TS+oil, poo bars, Sevi pumpkin poo, Co-wash
LI/RO:MD RCLI, KCKT, As I am LI, Andalou LI-GVPCB, DB pumpkin, Sevi pumpkin, EMBC
Stylers: CHS CK, CJPP, CR CM (occasionally LALSG or BRHG)
LOVE, LOVE Andalou Naturals Sunflower & Citrus hairspray!

$5 off 1st order under $40, $10 off over $ iherb use code KEY066