Observed and modelled frequency ratios r₀₁, r₁₀, and r₀₂ of Kepler-93. In red we plot the ratios computed by Davies et al. (2016) without error bars for readability reasons. These errors are similar to those found in this work. The observed ratios of our study (orange) are computed with the definitions of Roxburgh & Vorontsov (2003), while the ratios from Davies et al. (2016) come from their fitting procedure. The modelled ratios are plotted in purple for the fit of the frequencies and in cyan for the fit of the ratios. The bump at the right of the plot for the r₀₁ and r₁₀ ratios is likely due to surface activity during the measurement.