Fraction of high-mass (8.8 < log M_★/M_⊙ < 9.5) galaxies classified as bursty as a function of redshift using the Bayes factor (see Sect. 5.1). The left panel shows the results when full spectral information at each redshift is used, while the right panel shows the results assuming the same rest-frame wavelength coverage as a galaxy at z = 11. Uncertainties on the fractions are derived from Poisson distribution, while uncertainties on the redshifts correspond to the 16^th–84^th percentile range of the redshift distribution within each stellar mass bin. The gray downside triangles show the fraction of stochastic massive galaxies (log M_★ > 9) found in Ciesla et al. (2024), obtained from the variations of the recent SFR using nonparametric SFH. There is a trend showing an increasing fraction of bursty galaxies with increasing redshift that is not due to the difference in wavelength coverage.