He also frequently complained about the sound quality in them.

As you know, I've frequently complained about her and then tried my best to be nice.

On the other hand, passengers frequently complain about the quality of services.

The miners frequently complained about their working and living conditions.

He has frequently complained about the board's hostility to legal services.

He frequently complained to the referee but was told to play on.

Several workers said they had frequently complained about hazardous conditions but received no response and eventually gave up.

Japanese officials complain frequently about the quality of the analysis available to them on a day-to-day basis.

Utah officials have frequently complained about the law's reporting requirements.

Advertisers themselves frequently complain that decisions in apparently similar cases have not been consistent with each other.