Very rare!

A diseased person, who has got no knowledge of medical science, is incapable of treating himself and he has to go to an expert doctor for treatment. The doctor examines him and makes diagnosis of the disease and prescribes medicine and diet for the treatment. If the ailing person follows his advice and undergoes treatment, he is cured. Similarly, we are to go to an expert spiritual doctor — a bona fide Guru (Divine Master) who knows the cause of the malady of worldly affliction. And can prescribe correctly prescribe for the definite cure of the disease of cycle of birth and death. But, it is very difficult to get a bona fide Guru at the present sinful black age (Kaliyuga) of corruption. In fact, it is stated in the scriptures that there may be many so-called Gurus to grab money from disciples. A bona fide Guru who can dispel all afflictions is rarely to be found. If we want quality, we have to sacrifice quantity.

--- His Divine Grace Srila Bhakti Ballabh Tirtha Goswami Maharaj