Constantly.

Ask yourself:

Does gratitude characterize your thoughts of God? Thankfulness is a good test of your faith. Its absence demonstrates that your faith is more lip service than experiential knowledge. Your days, whether easy or difficult, should be filled with thanksgiving because while life changes drastically, your God remains the same forever. He is constant — constantly good, loving, and faithful.”

—Joe Thorn, “Thanksgiving,” Note to Self, p. 44.