“…As for the frequency, the Table 3.2b also shows the number of each element. [01], [04], [06], [07], [08], [09],[1 0], [12], [13], [14], [15], [16], [18], [21], [22], [25], [27] Handling historical information (Frequency:27) [01], [02], [04], [06], [07], [08],[0 9], [10], [12], [13], [14], [15], [16], [17], [18], [21], [25],[2 7], [29], [30], [31], [32], [34] [07], [08], [22], [25], [27], [29] [02], [07], [08], [11], [17], [25], [27], [29], [30],…”