Doctors can you tell me how often should women get a mammogram?

Yearly. After forty. Baseline 35 or ten years before mothers or relatives breast cancer.
Screening mammo. According to the American Cancer Society, American College of Radiology, and most others, annual screening mammography should begin at age 40. Screening may begin sooner if you are a BRCA carrier or are otherwise at high risk.
Mammogram. No good answer , the recommendations are tohave one at age 40 and annually after menopause, typically young woman have dense tissue and mammograms are not useful.
This depends. For women with no particular risk factors and previously normal mammograms, the recommendation is annually. If there are other concerning factors, it may be recommended more often.