Gain at Break frequency of OpAmp
What you infer is correct. At DC the open loop gain is in the realm of 100,000 to 1,000,000 for most op-amps and this would naturally mean that the break (3 dB point) is a few hertz in frequency. Here's an example: -



It brings in the term gain-bandwidth-product i.e. the product of open-loop gain and bandwidth. For a regular op-amp having a 20 dB per decade slope (single order), the product is virtually a constant.

Picture taken from this slide show.