The OT names demons in 11 verses; the NT uses δαιμόνιον 63 times across 55 verses. Three identifiable mechanisms — translation, speculation, and sovereign reframing — produced that explosion.
The Old Testament mentions demons fewer than 75 times across 39 books. That silence is the theological datum — every adversarial spirit in the Hebrew Bible operates within YHWH's explicit sovereignty, not against it.