Of course, people love to say "If Freeza trained one more month, he'd have beaten Goku".
But the way "potential" works, I'm not too sure Freeza training past that four months would have a big effect. Certainly not result in the same amount of gains Freeza got in that four month span.
It's like Vegeta told Goku, they'd both have trouble getting much stronger because they hit their ceiling. At some point, once you tap your "latent potential", which is all Freeza did, you hit the ceiling, at which point gains become very minimal. Two years of training won't net you the same increases that several months would, if you have untapped potential to mine.
Vegeta's idea of training is not well developed in Namek. The most significant training he got was a blast through the chest from Krillin and some healing hands from Dende. Not really applicable in Freeza's body. Now could he attain the Golden Form? Maybe but I'm not sure why he would since as Freeza nothing could come close to hurting him. And even if he could I think he'll end up making the same mistake since his Super Vegeta was ultimately more flawed than Goku's due to the latter letting his body adjust to the power.
Cute point then you realize Vegeta power level was 18,000 into his late 20s and increased so far passed that because of Plot. So they can make Frieza as strong as the plot needs him to be.
Even in DB stupid logic Frieza never trained in his life and increase by so much just by training for a few months. They never said anything about Frieza having a cap.
You want to go even further, DB characters power level just jump around when the plot demands it. Frieza when he came back in his first Form was stronger than SSJ Gotenks. His second form should double and his true form is 120 times stronger than his second. Which means his final or true forum should be 240 times stronger than SSJ3 Gotenks. Goku was equal in his base form. Yet Trunks was as strong as SSJ3 Goku in the Manga which is stupid in it self.
I think he would have beaten Goku with one more month of training. But not because of potential or further increase in power, we don't know how that would work with Frieza, but because he would get used to his new form.
I think goku would win againsted vegeta 'cause vegeta train's in a ship that he mostly train his speed while goku trains both on king kai place that is 10 times heavier than the earth gravity he run laps so he training his stamina and speed plus he use weights to train his strength shot I think that goku could go againsted beerus and win cause goku with ssg made beerus go 70% plus ss blue. Can make him go in 75-80 plus with Kaioken X 10 probably be 100%