Display number of times an item appears in a spreadsheet column

number-of-times-item-appears-in-column.js

values = [];
item=thisComp.layer("data 01").text.sourceText.toString();
for(i=0;i<=thisComp.layer("state-gradient.csv")("Data")("Number of Rows")-1;i++) {   
  values.push(thisComp.layer("state-gradient.csv")("Data")("Outline")("Data")("Data " + i).value); 
}
values.filter(function(value){
    return value === item;
}).length