Is there an upper limit on display results?

[kookil]

Hi! I have been running the results of searching for a certain term in the United States for a hundred consecutive weeks. Each dataframe has a maximum of 200 rows. Does this mean there is an upper limit on the results displayed, or is this a limitation of Google?

[kookil]

And is there a lower limit to the results? Because every time I run the results, only a few have values greater than 0, but there will also be some areas where the value is equal to 0. Does this mean that there are people searching in these places, but there are too few people searching? The result is calculated as 0?