I am married and I do not have sexual desire and I suffer from frigidity

Unless there is a physical medical reason.
Flexible yourself on the development of your life as health.
Yourself to the benefit of occupancy and sports and activities that suit your desires and tastes and in a balanced way to organize your lifestyle.
If you fill your day with work that meets the goals you need in your life.
It is useful to diversify the methods of dealing with the wife in a loving and orderly manner.
The relationship between the couple is not only sexual but affectionate and loving and compassion.
Do you have doses of that in your day?
If not, enter love and her sessions into your life system.
Do not think about sex for a whole month with full introductory sessions.
Then gradually start increasing love doses toward the full relationship.
If you find that it is ongoing consult a specialist specialist near you.