How often can DEXA be done?

Excuse me, could you please clarify for me how frequently the process of DEXA, or dual-energy X-ray absorptiometry, can be performed? I understand it's a diagnostic tool used to assess bone density, but I'm curious about the recommended timing between tests. Is there a standard interval at which DEXA scans are typically conducted, or does it vary depending on individual circumstances? Additionally, are there any factors that might influence how often someone should undergo a DEXA scan? Thank you for your time and assistance in addressing my query.