Some common-mode chokes, including this one, are rated in ohms instead of in henries. Why? Isn't the impedance injected by the common-mode choke entirely frequency dependent? Is there an assumed frequency at which the specified ohm-age is calculated?
It is measured in ohms because it doesn't behave like an inductor. It's inductive at low frequencies, lossy/resistive in between, and capacitive at very high frequencies.
The resistance is usually measured at 100MHz, but check the datasheet to be sure.
That particular part there is a ferrite bead, not an inductor, so it has no inductance.