I have a spreadsheet that has a column for cell sites and another column for frequency like this:

```
SITE FREQUENCY
MA1084 687
MA1084 687
MA1084 687
MA1084 4382
MA1084 4382
MA1084 4382
MA1096 4358
MA1096 4358
MA1096 4358
MA1096 687
MA1096 687
MA1096 687
MA1096 4382
MA1096 4382
MA1096 4382
```

I'd like a formula that will add up all the unique combinations of SITE and FREQUENCY. My expected output is below. Basically I want to know how many unique frequencies each cell site has.

```
SITE FREQUENCY COUNT
MA1084 687 2
MA1084 687 2
MA1084 687 2
MA1084 4382 2
MA1084 4382 2
MA1084 4382 2
MA1096 4358 3
MA1096 4358 3
MA1096 4358 3
MA1096 687 3
MA1096 687 3
MA1096 687 3
MA1096 4382 3
MA1096 4382 3
MA1096 4382 3
```

I can do this with a pivot table but am looking for a formula based solution. Any help is appreciated.

## Best Answer

One solution is to use a helper column. While not always ideal, it depends on how you need the output displayed. Assuming

`Site`

and`Frequency`

are in columns A and B, then in the concatenate column type:`=A2&B2`

. Then in the`Count`

column type:`=COUNTIF(C:C,C2)`

. Then you get the following: