user: Question: Which Frequency MHz has a Call sign of K210DV?
Columns: ['Call sign', 'Frequency MHz', 'City of license', 'ERP W', 'Class', 'FCC info']
Types: ['text', 'real', 'text', 'real', 'text', 'text']
Sample row: ['K201ER', 88.1, 'Holbrook, Arizona', 50.0, 'D', 'FCC']
SQL:

assistant: SELECT "Frequency MHz" FROM "Table" WHERE "Call sign" = 'K210DV';