Looking on the internet deeply has found these results:

Flatbread pizza is the most popular phrase on the web.

Flatbread pizzas 1143,000 results on the web	Flatbread pizza 11,360,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I like flatbreads, not pizza. So, I have some flatbread pizza;	I like flatbreads, not pizza. So, I have some flatbread pizza;

Flatbread pizzas

1143,000 results on the web

Flatbread pizza

11,360,000 results on the web

More popular!