The report presents evidence that a lognormal distribution provides a satisfactory model for the relative frequencies of occurrence of 420 conceptual nouns. The nouns had been randomly selected from the Thorndike-Lorge (T-L) source and had been used as the words in a familiarity scale. The model also provides a satisfactory description of the words from the scale which were common to the T-L count and the later Ku{\v{c}}era-Francis (K-F) count and of scaled words in the T-L count which were missing from the K-F count. For common words, there has been a very small shift toward lower frequencies of occurrence in the time between the counts. The shift originated in frequency changes in words from the middle and upper frequency categories of the familiarity scale. The report suggests that differences in types of words are responsible for differences in distributions obtained by Carroll for all words in the K-F count and the distributions presented here. It is suggested, further, that the familiarity scale continues to be useful.
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