IIRC, there were two songs titled “Hold On” in the top 10 of the Billboard Hot 100 chart in the summer of 1990. One was by Wilson Phillips, and the other was by En Vogue. These were two completely different songs–different writers, different melodies, different lyrics.
Has there ever been another time that this has happened? Even if you expand beyond the top 10 to include the entire 100-song chart? The closest other example I can think of is “Jump” by Van Halen and “Jump (For My Love)” by the Pointer Sisters, both peaking in 1984. The latter was originally simply titled “Jump,” but the parenthetical phrase was added to avoid confusion with Van Halen’s song. I’m not certain if these songs were in the top 10 at the same time.