Counting numbers via expression with non-animated text.

Do you want the line of text to move as the last two numbers increase? If that is it and you want to type in the line of text add this line to the end of Dan's expression:

prefix + outStr + decimals + " " +(value)

If you want to add the text to the expression change the last line to this:

prefix + outStr + decimals + " This is my text"

 One caution. Unless you use a monospaced font the text is going to jump around a lot as the numbers animate on because 1 is narrower than a 0. It's going to look bad. 

If you are stuck with a standard font then you'll have to come up with an expression that counts the number of digits the counter is generating, assigns the average spacing for each digit, then adjusts the position of the supplemental text. I can't do that one without experimentation. Personally, I would just set up the counter, then add a second layer and animate position. Don't make this too hard.

I would just take a look at Universal counter - Dan Ebberts's. If you read the article and use his counter, you can add your extra text right inside the expression. If you modify the last section of the expression you can also include text entered manually and put it before or after the counter.

Another option is to use sourceRectAtTime() to control the position of a second text layer that has been parented to your counter. 

Without seeing a screenshot showing exactly what you want to achieve and a little more detailed description it is pretty hard for me to give you a complete solution.