What are the opposite words for over a heartbeat?

The phrase "over a heartbeat" typically implies that something happened very quickly or suddenly. Antonyms for this phrase might include words like gradually, slowly, or calmly. These words suggest a slower pace, a more deliberate approach, or a greater sense of control. For example, instead of acting "over a heartbeat," one might act deliberately or patiently instead. Similarly, instead of making decisions rashly, one might take a more measured approach and carefully consider all options before making a move. By using the right antonyms, it's possible to convey a completely different tone or mood from the phrase "over a heartbeat.