Google sheets: Count Specific Characters in a string of words

Question

I have on Google sheets this data (It is the same principle in excel).

I want to count the numbers of dose in each strings.

I use this formula and it return me this:

=LEN(L3)-LEN(SUBSTITUTE(L3,"/",""))

Product	dose	Count "/"
1		0
2	5G	0
3	10G/20G/24g	2

I would like instead in returns me this :

Product	dose	Count "/"
1
2	5G	1
3	10G/20G/24g	2

How I can modify my formula to return me this?

Answer 1

In C2:

=ARRAYFORMULA(IF(LEN(B2:B),LEN(B2:B)-LEN(SUBSTITUTE(B2:B,"/",""))+1,""))

Or:

=ARRAYFORMULA(IF(LEN(B2:B),LEN(REGEXREPLACE(B2:B,"[^/]",""))+1,""))