What is the most idiomatic translation of "how often" into Spanish in questions like: How often do the buses stop here? How often does it rain in November? How often do you get headaches? How often ...
The Diccionario panhispánico de dudas does not offer a suggestion regarding the use of cómo to ask for the price of something (item, service, or currency). I am familiar with the variants ¿a cómo ...