Perhaps I am (incorrect), Nora. It's truly hard to come up with an accurate number when it comes to female pastors in Pentecostal churches. I know that the Four Square denomination was founded by Aimee Semple McPherson and still has a significant, but rapidly falling, number. 

Part of the problem with assessing this, is that many Pentecostal churches nowadays have a "husband and wife" pastor as their formal leaders. Both are known as pastors, but in practice it's rare that the wife pastor will teach the full congregation. In my opinion, the key to finding a real woman in charge is if she's listed as the senior pastor. In Pentecostal churches, that's almost always where the power resides.

You might be interested in this article, Nora. It discusses just this issue - I found it enlightening;

https://www.faithandleadership.com/qa/james-bowers-and-kimberly-alexander-leadership-and-women-pentecostal-ministry

regards ... Dave