For more info see https://developer.android.com/guide/topics/resources/string-resource.html#Plurals

string.xml

<plurals name="charge_notification_count">
   <item quantity="zero">Hydrate while charging reminder sent %d times</item>
   <item quantity="one">Hydrate while charging reminder sent %d time</item>
   <item quantity="other">Hydrate while charging reminder sent %d times</item>
</plurals>

UsingPluralization.java

int count = PreferenceUtilities.getChargingReminderCount(this);
//the first count parameter selects the appropriate plural string and the second count parameter is inserted into the %d placeholder.
String formattedChargingReminders = getResources().getQuantityString(R.plurals.charge_notification_count, count, count);