15. The method as claimed in claim 14 , wherein the visual indication of the frequency of occurrence of the at least one query term in the first format comprises a visual indication of the frequency of occurrence of each of the query terms, and the compressed visual indication of the frequency of occurrence of the at least one query term in the second format comprises a compressed visual indication of the frequency of occurrence of each of the query terms.
15. The method as claimed in claim 14 , wherein the visual indication of the frequency of occurrence of the at least one query term in the first format comprises a visual indication of the frequency of occurrence of each of the query terms, and the compressed visual indication of the frequency of occurrence of the at least one query term in the second format comprises a compressed visual indication of the frequency of occurrence of each of the query terms. 16. The method as claimed in claim 15 , further comprising: arranging the visual indication of the frequency of occurrence of each of the query terms in the first format in columns adjacent the title of the modified document surrogate with the corresponding query term as a heading of each column; and arranging the compressed visual indication of the frequency of occurrence of each of the query terms in the second format in columns adjacent the representation of the title of the modified document surrogate.