  We analyze all the available Atacama Large Millimeter / submillimeter Array
archival data of the nearby Type-II Seyfert galaxy NGC 1068, including new 100
GHz data with the angular resolution of 0\farcs05, which was not included in
previous continuum spectral analysis. By combining with the literature data
based on the Very Large Array, we investigate the broadband radio continuum
spectrum of the central $\lesssim7$ pc region of NGC 1068. We found that the
flux density is between $\approx$10-20 mJy at 5-700 GHz. Due to the inability
of the model in previous studies to account for the newly added 100 GHz data
point, we proceeded to update the models and make the necessary adjustments to
the parameters. One possible interpretation of this broadband radio spectrum is
a combination of emission from the jet base, the dusty torus, and the compact
X-raying corona with the magnetic field strength of $\approx20$ G on scales of
$\approx30$ Schwarzschild radii from the central black hole. In order to firmly
identify the compact corona by omitting any other possible extended components
(e.g., free-free emission from ionized gas around), high-resolution/sensitivity
observations achieved by next-generation interferometers will be necessary.
