Two criteria for a phonemic notation--assignment of symbols to sounds and the influence of purpose--were discussed. Also presented were three purposes of a phonemic notation: (1) as an initial teaching medium, (2) for an intermediate stage or stages of phonemic spelling reform of English, and (3) for an ultimate phonemics spelling reform. Data of relative frequency of phonemes and/or graphemes were viewed as having importance in (1) devising phonemic codes and in formulating rules, (2) assessing compatibility with traditional orthography, (3) estimating the possible savings in the writing and printing of superfluous letters, and (4) standardizing a type of notation. Examples were given which illustrate the use of data on relative frequency in making decisions related to standardizing the type of notation. Tables and references are included. (DH)