That is precisely why a Kingdom publisher who is in a nursing home or who is somehow incapacitated may report field service in 15 - minute increments rather than full hours.
تَفَحَّصْ عَادَاتِ دَرْسِكَ بِرُوحِ ٱلصَّلَاةِ وَٱسْأَلْ نَفْسَكَ :‏ ‹ هَلْ أُعْطِي أَفْضَلَ مَا لَدَيَّ لِيَهْوَهَ ؟‏