x::AbstractVector
relativefreq::Bool = false
horizontal::Bool = false
nbins::Int = 10

using Vega, Distributions

x = rand(Gamma(3.0, 1.0), 100_000)

v = histogram(x = x)

using Vega, Distributions

x = rand(Gamma(3.0, 1.0), 100_000)

v = histogram(x = x, relativefreq = true)