It will take a long time to reach the burn in level of a Nordost Vidar. See below from the Nordost website:
Why is the VIDAR better for breaking in cables?The VIDAR is designed to put a very wide band signal of varying amplitude through the cables connected to it. In the normal course of use, cables such as tone arm and analog interconnects never get a high level of signal. This means it can take a long time for them to break in fully. The VIDAR speeds up this process by the combination of frequencies it puts through the cable. The results from the VIDAR will always be better than any other break- in method used.
Cables such as tonearms and analog interconnects are normally never exposed to high signal levels, so it takes an extra long time for them to break in. When a cable is connected to the VIDAR it is subjected to a wide band signal of varying amplitude. The combination of frequencies put through the cable speed up the break in process. Results from the VIDAR will always be better than any other break in method used.
You may want to look at the Nordost web site for additional information.