Show more tick marks on axes

[Arrozito]

How can one control how many tick marks appear on the axes?

[pbreheny]

library(visreg)
fit <- lm(Ozone ~ Solar.R + Wind + Temp, data=airquality)

# Base graphics
visreg(fit, "Wind", xaxt='n')
axis(1, labels = 2:21, at=2:21)

# ggplot
visreg(fit, "Wind", gg=TRUE) +
  ggplot2::scale_x_continuous(breaks=2:21, labels=2:21)
#> Loading required namespace: ggplot2

^{Created on 2024-04-16 with reprex v2.1.0}