BUG: don't exclude `u_frequencies`
BUG: don't exclude `u_frequencies`

mnicholl/MOSFiT,bmockler/MOSFiT,mnicholl/MOSFiT,bmockler/MOSFiT,guillochon/MOSFiT,villrv/MOSFiT,guillochon/FriendlyFit,mnicholl/MOSFiT,guillochon/MOSFiT,guillochon/MOSFiT,villrv/MOSFiT