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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
It is better known for its use of the blunt instrument of budget cuts but now the O'Farrell government is turning to ''nudge theory'' to change people's behaviour in areas as diverse as debt collection and smoking rates.