Please read [i18n-node](https://github.com/mashpie/i18n-node#__n) module for singular and plural. you can use this:
```
    "unit": {
        "one": "%s minute",
        "other": "%s minutes"
    }
```

and call :
````
i18n.__n("unit", "units", 1) display 1 minute
i18n.__n("unit", "units", 3) display 3 minutes
````