"Men think, no doubt by their actions or words, they make it abundantly clear to much smaller species such as women that they have the power over life and death," Judge McDonald said.
"Domestic violence is rife in our society. Latest research shows every six minutes a woman is assaulted by her partner in this country. That is unacceptable."
Brass and his partner started a relationship when she was 15 and now had two children, the court was told.
On May 7, 2014, Brass was summonsed to appear in the Kaitaia District Court on one charge of sustained loss of traction. Later, in the court foyer, he spoke to his partner and tried to get her to say she was the driver so he could avoid a conviction. She refused and an annoyed Brass had to plead guilty to the charge, but he later took it out on the woman.
At one stage during the beatings, she had to lock herself in the bathroom but was punched five times in the face when she opened the door.
Judge McDonald said the beatings stopped when visitors arrived. On other occasions, she was strangled, verbally abused, and kicked in the stomach.
The pair no longer live together and Judge McDonald granted her a domestic violence order against him after she requested it.
Crown solicitor Mike Smith said the community was concerned about domestic violence and he highlighted a prolonged series of violent acts, particularly strangulation, that Brass perpetrated on his partner.
The lawyer for Brass, Tracy Spencer, said by pleading guilty, her client saved his victim from giving evidence in court. He had mental health issues and had been diagnosed with post-traumatic stress and psychotic disorders.