Does Patience 2 affect the chance of getting a bite from a Big Fish?

I need to clear this up since all the information I've been able to find has been conflicting or unclear. I'm trying to catch Namitaro by spamming Chum and nothing else. I think getting as many bites as possible gives me the best chance to find Giant Takitaro and trigger Fisher's Intuition. However, after a good few minutes of getting no !!! bites, I have to wonder, do I need Patience 2 to do this? Or is my method correct and I just have to be more patient (lol)?