1. During her free period , she would sometimes drop by to say hello. 2. Subsequent tests have produced even longer cancer-free periods , virtually the animals'entire lifetimes. 3. She has the longest symptom-free period known for a mercury poisoning death. 4. Annual frost-free period averages 199 days . The winds are predominantly north-westerly. 5. The crash ended a 35-month accident-free period for China's civil aviation industry. 6. My minimum standard for these things is a three month drama-free period . 7. From the symptom-free period to early signs of complete immune-system breakdown. 8. Discounted and ski-free periods also herald the opening of some resorts in mid-November. 9. Vitale said she had emerged from her communications-free period with a new perspective. 10. The frost-free period is 120 135 days, from May to September.