Putting all your relative’s life events into a chronology can be a good way to organize information. Listing out events in sequential order can be a great way to outline a biography.
Gaps are opportunities. What took place during those periods? It might have been absolutely nothing or it could have been significant? Did the person temporarily leave the area? Have records during the gap time been adequately checked? Was the ancestor ill? Or are records simply not available during the time period?