Hi there,

we have a log line like:

```
Invalidating cache with patterns: pattern_1, pattern_2, pattern_3 .....
```

basically we would like to:

- count over time the patterns being invalidated, e.g. in the line above there are 3 patterns so extract in some way the number of patterns in each line and count them (summing the number of patterns per line)
- count over time each pattern how many times it gets invalidated

I’ve tried to see if there’s a split or count function that counts occurrences in each line but I haven’t found anything