This data set gathered from the source appendix includes 48 nonwords with either high or low frequency.
tgb1990
A data.frame with 48 rows and 3 variables:
Orthographic representation of nonwords.
Phonological representation with adjusted phonological symbols.
Word frequency bin: H (high) or L (low).
Treiman, R., Goswami, U., & Bruck, M. (1990). Not all nonwords are alike: Implications for reading development and theory. Memory & Cognition, 18(6), 559-567. doi:10.3758/BF03197098
See source paper for details.