7. The word processing system of claim 5, further including means operable in response to pressing of a discrete other key on said keyboard by said operator for again activating said means for clearance of said display and for presenting in the again cleared display a next highest count contained in a given frequency-of-use count element, together with the word in the correction buffer associated with said given frequency-of-use count element.
8. The word processing system of claim 7, wherein said particular count is present in a given frequency-of-use element and the count value present in at least one other frequency-of-use element is equal to said particular count; and additionally including a further discrete key on said keyboard, an Identical Frequency Counter, a Down Counter; means for comparing said particular count with the count value in each said frequency-of-use element in response to the operator's pressing of said discrete other key, said means for comparing having an equals output and issuing said equals output when said count value in said at least one other frequency-of-use element is compared with the particular count, means for clearing said display and presenting therein the particular count and the differentiable word associated with the at least one other frequency-of-use element in response to issuance of the equals output, means incrementing said Identical Frequency Counter in response to issuance of the equals output; and means for reviewing previously displayed frequency-of-use values and associated differentiable words, said reviewing means operating in response to each pressing of said further discrete key by the operator and comprising means for detecting presence of a non-zero value in the Identical Frequency Counter, means for changing said non-zero value to a decremented value differing by unity in response to detection of said non-zero value, means for setting said decremented value in said Down Counter, and means for renewing an operation of said means for comparing, said Down Counter being decremented in response to each issuance of the equals output, and means responsive to transition of the Down Counter to zero for clearing said display and then presenting therein the particular count and the differentiable word associated with the next previous element of the frequency-of-use elements containing a count value equal to the particular count.