Hello, I can help with this task. If I understand correctly you have some big database with words from which you wish 4 word sequence that appears most times. I can write java application to take every 4 successive words and make map that will record all distinct 4 word sequences. In the end we take one with most appearences. Check my profile to see that people who worked with me are extremly satisfied with results and speed. I have 100% completion rate and I can start right away. Best regards, Dusan