I'm trying to do a conditional formatting that matches on the double quote character followed by a zero. i.e.

"0 / 10" : this should match as true

"10 / 10": this should match as false

This regex is incorrect, as it matches on both:

```
=REGEXMATCH(B:B;"0 /")

```

I expect to be able to use the formula standard of escaping the " with an extra quote. It accepts this formula syntactically, but does not match:

```
=REGEXMATCH(B:B;"""0 /")

```

I tried matching with punctuation characters, no match:

```
=REGEXMATCH(B:B;"[[:punct:]]0 /")

```

I can use [digit[ to match the 10/10 case, but ~digit doesn't match the zero with a quote in front of it:

```
=REGEXMATCH(B:B;"[^[:digit:]]0 /")

```

I even tried concatenating the specific character, no match:

```
=REGEXMATCH(B:B;CONCATENATE(CHAR(34), "0 /"))

```

I'm very confused at this point. If I insert any other special character before the zero, I have no trouble matching it. But it seems like double-quote just isn't treated like a regular character somehow. Does anyone know what I'm doing wrong?