according to this research from 2014, 1 in 8 americans eat a pizza on any given day
https://www.ars.usda.gov/ARSUserFiles/80400530/pdf/DBrief/11_consumption_of_pizza_0710.pdfthere were about 310 million americans in 2014, meaning 38.75 millions of pizzas consumed per day
about 50% of pizzas are eaten during dinner, and about 30% during lunch, with the rest spread out over breakfast and snacktime
assuming a pizza only exists the moment it finished baking, until it has been eaten, let's say a pizza exists for an average of half an hour
this means around dinnertime in america about 4.84 million pizzas exist every half hour
around lunch in america about 2.91 million pizzas exist every half hour
and about 194 thousand pizzas exist every half hour otherwise
