In physics, frequency is simply \$f\$.
Frequency: \$f\$ (with unit Hz = s-1)
Angular frequency: \$\omega = 2\pi f\$ (with unit rad/s)
However, when I read EE textbooks, they use `frequency' for both of them.
For example, when they say something like RF, they use frequency in Hz ― so \$f\$.
However, in textbook Signals & Systems 2th Ed. by A. V. Oppenheim et al,
they introduce fundamental frequency as \$\omega_0 = 2 \pi f_0\$.
When I try to solve problems like `find the frequency' without any appearance of \$f\$, \$\omega\$, or units, this drives me crazy.
How to differentiate them? Only by the context? I hope not...