The calculated distance (air line) between Zürich (Kreis 7) and Frauenfeld is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Frauenfeld is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 7) and Frauenfeld has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles