1. Start with a coverage pass, not a target
Move slowly over the whole triangle — clitoral head on top, both sides of the opening below — at low intensity, pausing at each point long enough to see a response before moving on. This pass is how you find out where she wants you to come back to; it's not a better way to touch, and if her feedback points to one place, staying there is the right answer.
There's no stopwatch answer to how long per point. A clear positive response means staying longer is the point; no response, or an overload signal, means move along. Feedback is the clock — and it isn't static: the same spot can respond differently at low arousal than at high, so what worked ten minutes ago may need re-asking.
Method is its own axis of that same variability: on the same night, with the same person, one kind of touch can work while another — a vibrator's buzz, say, or a pinpoint tongue — can be too much from the very start. And preferences can shift across days and over the years — yesterday's map is a draft, not a contract.
When a point gives you neither response nor overload, there's a middle option before moving along: vary one setting — the direction, the pressure, or the speed, rather than the place. A small change every fifteen or thirty seconds is one rhythm worth trying: under unchanging repetition, responses tend to fade, and laboratory research on repeated sexual stimuli has found this direction. In national survey research on genital touch, most women describe switching between more and less intense touch.
Treat those numbers as a starting rhythm, not a rule. The moment something clearly works, stop switching and stay with it.