Why D.C has no frequency?

Washington, D.C. lacks frequency in terms of certain public transportation services due to a combination of budget constraints, regulatory issues, and the relatively smaller scale of its transit system compared to larger metropolitan areas. Additionally, the city's layout and population density influence the demand and scheduling of services, leading to less frequent options in some areas. This can result in longer wait times for commuters and limited service during off-peak hours. Efforts to improve frequency often face challenges in funding and coordination among various transit agencies.