Problem with Term Frequency


I have a text and I want to extract the term frequency. Aftrer applying a stemmer node and other preprocessing (stop word filter, punctuation erasure, etc.), I used the BoW node and the term frequencies node on the follwoing text:

  • Reviews of Apple's new iPhone 8 and 8 Plus have been laudatory. However, the reviewers can't seem to get their minds off  the jewel of the Apple universe, the iPhone X. Both the iPhone 8 and 8 Plus are "awesome" and better than last year's models -- but iPhone shoppers who want to be part of the future will save their money and buy an iPhone X later in the year, suggested reviewer David Pierce.

The output regarding the absolute term frequency is strange. The stemmed term review has a an absolute term frequency of 6 and the stemmed term iPhone has a frequency of 10. 
I only count review 3 times and iPhone  5 times. 

Someone has an idea? 

Attached, you find the output table of the term frequency node. 


Thank you for help


have found an explaination to my problem in another forum post: