Actual time and Real-time

Real-time and actual time are semantically related In some cases you can replace phrase "Real-time" with "Actual time", this phrases are similar.

Real-time adjective - Of or relating to computer systems that update information at the same rate they receive information.

Actual time and real-time are semantically related in actual time for action or event topic. You can use "Actual time" instead a noun phrase "Real-time".