What is a word to describe a phrase such as "Anything can happen", which is often made in reference to baseball. This is frequently said, but "platitude" and "cliche" aren't the right terms. What type of phrase is this?
Of the many synonyms on offer, adage is a good fit:
A proverb or short statement expressing a general truth
It can be described as a set phrase:
- (grammar) A common expression whose wording is not subject to variation.
You might be referring to an idiom:
"...a phrase or a fixed expression that has a figurative, or sometimes literal, meaning. [...] There are thousands of idioms, and they occur frequently in all languages."
I'm rather fond of colloquialism
a word or expression used in casual language by common people.
You might want to call it pat phrase.
"as we speak" is a pat phrase that means "at this very moment" or "right now." The Grammar Exchange