How many times does a wren feed its chiks a day?

All day, from daylight to dusk, nonstop.. they find a bug, they feed one chick they are off to find another.. if you live in an area where they nest a bird hose with the back being a window in your home works great.. one way glass and you can watch the nesting.. my children still have pictures of a mocking bird that was our "guest" for 3 years...