None (82 words)
itself, plains, row, shouted, wrote, burning, design, foot, gas, grass, joined, you're, brown, cents, cloud, grew, president, skin, trouble, valley, alone, drawing, experiment, lost, sent, symbols, decimal, east, equal, express, information, mouth, pay, single, yard, control, party, practice, report, rise, seeds, stick, straight, yourself, bank, choose, clean, coast, period, suppose, visit, wire, woman, God, captain, caught, fell, please, received, strange, team, whose, business, child, cost, desert, direct, history, increase, maybe, ring, serve, art, human, lady, students, uncle, corner, crops, doctor, electric, hit
Once (18 words)
least, England, ears, law, cool, key, bad, engine, save, wear, touch, statement, bit, garden, break, feeling, hunting, separate