A vile thug bombarded his former partner with despicable messages and calls which included a threat to rape her.
Kevin Newton had been given a chance to keep his freedom for assaulting the woman, including by pushing her into the path of cars, when he was given a suspended prison sentence in January.
But in April he breached his restraining order by contacting her more than 50 times in one day.
The woman was left terrified after he threatened to rape and bite her, Newcastle Crown Court heard.
Judge Sarah Mallett said the two "serious assaults" he was sentenced for on January 26 would have justified a prison sentence but she gave him a chance after being told he had made positive changes to his life.
On that occasion, he was given a ten month suspended sentence and a restraining order which banned him from contacting her.
Judge Mallett said: "However on April 18 you contacted her more than 50 times.
"What you said to her was despicable and, no doubt, terrifying.
"It included a threat to rape her and bite her and your behaviour continued when her brother answered the phone and told you to stop. You threatened him."
The judge added: "You chose to waste the chance you were given and as a result further offences were committed against the same victim."
Newton, 22, of Ecgfrid Terrace, Jarrow, South Tyneside, pleaded guilty to breaching the restraining order and the suspended sentence and was jailed for 13 months. He is now subject to a five year restraining order.
Nick Lane, defending, said the victim had contacted him first but Newton got drunk after losing his job and failing to reconcile with the woman.
Mr Lane added: "He is not proud of his behaviour.
"He makes no argument about the nature of the messages she received. They were vile and he is truly sorry for sending them.
"He accepts he would have caused her hurt and harm at a difficult time for her and he feels very sorry for that."
Mr Lane said Newton has spent his time remanded in custody for the past month using matchbox kits to make models and picture frames and added: "He regrets very much your honour's words (from January) weren't at the forefront of his mind in April. The message has been firmly rammed home by his stay in custody."
We reported in January how Newton pushed his former partner onto a road into the path of oncoming cars as she tried to help him.
He launched two shocking attacks on his victim in one night after he turned up at her door in a distressed state and she offered assistance.
The first attack happened when the woman accompanied Newton on a Metro train from Chichester, in South Shields, to Jarrow to ensure he got home safely.
Newton grabbed her by the throat then pushed her into a seat and onto the ground.
The court heard Newton launched a second attack when they got off the train at Jarrow, where she was pushed onto the road, into the path of cars.
He pushed her and at one point put her to the ground. He then leaned over her and punched her repeatedly about her head and body.
The court heard the victim was left with a bruised face and black eye as a result of the violence.
Newton admitted two charges of assault and was sentenced to 10 months imprisonment, suspended for two years, with 150 hours unpaid work and programme and rehabilitation requirements.