Snippets
Say a little. Paste a lot.
“My email address.” Your actual address. Exact words, in that order — nothing similar, nothing fuzzy — so it never fires when you did not mean it.
Triggers are two to six meaningful words. Everyday filler like “and then” is refused, because it would expand in the middle of a real sentence.
Snippets compile into the same matcher as vocabulary, so there is one pass while you dictate, not a second cloud round-trip.