I have the below If statements using some hard coded strings and I want to make them use as custom labels. I have created custom labels with the same String names as given below. So how can I make these statements to use the Custom Labels I created ?

```
if(monitoringFrequency == 'daily'){
            return dateValue.addDays(1);
        }else if(monitoringFrequency == 'weekly'){
            return dateValue.addDays(7);
        }else if(monitoringFrequency == 'monthly'){
            return dateValue.addMonths(1);

```