Answer rate by hour will show you a shift you never staffed
Before changing a headline, pull last quarter's calls by hour of day and count how many nobody picked up.
Any phone system or call tracking setup can produce this. Answered, abandoned, sent to voicemail, by hour and by day of week. It takes an afternoon and it usually ends the argument about whether the problem is traffic.
Look hard at early mornings, late evenings and weekends. Casinos, hospitals and warehouses across the valley run around the clock, and the people who work those shifts call when they are awake, not when you are open.
Then look at the voicemails that were returned and how long that took. A callback the next afternoon in an anxious vertical is often a callback to someone who already hired someone else.
Decide what you will actually do with the hours you cannot cover: staff them, use a service, or route to a scheduled callback that you promise and keep. All three beat an unanswered ring.