As a general heuristic:

- if your woman is too busy and not spending time with you, your issue is mainly desire

- if your woman complains you're not around more, your issue is mainly comfort

Contrary to popular manosphere belief, both of these will reduce sex in a relationship. Some women who feel ignored will chase and use sex to entice men, but most over time will feel a man's indifference as rejection, and shut down sexually

Also relevant is the nature of you not spending time with her. If your attention is occupied with low-energy tasks, cerebral stuff, she's more likely to be dissatisfied. If it's with high-energy physical activity, there's more desire in your absence.

Women like seeing action.