1. A computing device to provide a personalized search library based on continual concept correlation, the computing device comprising: a natural language analyzer to (i) receive event data representing content accessed by a user of a client computing device and (ii) analyze the event data to extract concepts of the content; and a correlation module to (i) correlate the extracted concepts based on an order of the event data, (ii) adjust a weight of each extracted concept based on a frequency of the extracted concept occurring in the content, and (iii) store the correlated and weighted extracted concepts in a concept model that identifies the relative correlation and weights between each extracted concept.