Pilot reported OBE; X21 and X06 airports are assigned the same CTAF frequency which results in frequency saturation; interference; and general communication problems.

Narrative

CTAF 123.0 The common traffic advisory frequencies have not been reassigned among the many GA airports in Florida as well as the rest of the country. 123.0 is used at OBE; X21; X06 all of which are busy airports. Often it is difficult to make a transmission without stepping on someone else and this is an unsatisfactory condition and it's a safety hazard and it's not necessary since years ago the GA fleet was encouraged to invest in new radios capable of three decimal digit frequencies. These expanded frequencies were not implemented at least not implemented at the GA airports. Frequencies 122.8; 122.9 are also being shared by multiple GA airports all within range of each other.To make a severely taxed communication system even worse; the FAA has refrained from advocating to GA pilots not to use the term 'traffic' when broadcasting positions and intentions on the CTAF at the various airports. It is entirely clear to just use the name of the facility without the term 'traffic'. Dropping saying traffic will relieve the frequency congestion.I feel the system would be safer if my suggestions were implemented.