Dictionary generator

[Irv1n]

I need ideas how to implement such a dictionary, where the program will request data and ultimately get this kind of dictionary?
For example:

ac_voltage_multimeter = {(10, V): {(50, Hz): ((9, 'V'),), (60, Hz): ((9, 'V'),), (400, Hz):((9, 'V'),)},
(100, V): {(50, Hz): ((90, 'V'),), (60, Hz): ((90, 'V'),), (400, Hz):((90, 'V'),)},
(1100, V): {(50, Hz): ((200, 'V'),), (60, Hz): ((200, 'V'),(400, 'V'),(600, 'V'),(800, 'V'),(1000, 'V')), (400, Hz):((200, 'V'),)}}