I tried Questions Dos from stackexchange to get total count of questions for perticular tag but it has some limitation like That API return only 30 data at a time and max 100 data(question) But I need more than 10,000 counts, If I go through all page and count those questions using js or php it will take lots of time any sort way to get the total count of that question?
Example API: https://api.stackexchange.com/2.3/questions?tagged=airflow&site=stackoverflow;
I tried https://api.stackexchange.com/2.3/questions?tagged=airflow&site=stackoverflow API
and I get the first 30 items
But I want total number of those questions

To get a total of tagged "airflow" you need to use a custom filter
https://api.stackexchange.com/2.3/questions?tagged=airflow&site=stackoverflow&filter=!w-*Ytm8YGWVl9..xoC
Alternative is looking at tags - I am not sure why there is a difference in the airflow tags - I have raised a META question if "synonyms" makes the difference
One tag:
https://api.stackexchange.com/2.3/tags/airflow/info?site=stackoverflow
Tags with airflow in the name
https://api.stackexchange.com/2.3/tags?order=desc&sort=popular&inname=airflow&site=stackoverflow
NOTE: If you need precise numbers, please read this meta discussion I started