What is the correct frequency for a 1080p blu ray player?

The television frame or field frequency will vary according to the content. It is the content that defines the frequency and not the hardware it plays on.

In Europe, the field rate for 1080i signals is 50Hz with the frame rate at 25Hz. For 1080p, the frame and field rate are normally both 50Hz

In North America, the rates are 30Hz and 60Hz respectively.

There are some other rates that might rarely be seen. Commercial film production uses a frame rate of 24Hz and sometimes video conversions will capture at a 24Hz frame rate. For an HD capture, the full description will be 1080p, 24. Similarly, in Europe, film is often converted to video at 25 frames per second by increasing the playback speed of the film. The resulting video can then be 1080p, 25.

Many Bluray and DVD players will simply output the video at the frame rate that is stored on disc rather than converting it to different rates.