Ggplot: Boxplot of multiple column values

Here is the type of data that I import as a csv file:

RPID    mm  ID  Time    Freq    Freq.1  Freq.2
RPO483  1   B6AC    5   23301   30512   
RPO483  1   B6AC    25  19      17  
RPO244  1   B6C     5   14889   20461   
RPO244  1   B6C     25  81      86  
RPO876  1   G3G3A   5   106760  59950   103745
RPO876  1   G3G3A   25  4578    38119   37201
RPO876  7   F3G3A   5   205803  148469  173580
RPO876  7   F3G3A   25  28648   30321   26454
RPO939  7   F3E324A 5   242285      
RPO939  7   F3E324A 25  42837       
RPO934  7   F3E325A 5   242001  129272  112371
RPO934  7   F3E325A 25  73057   58685   66582

For each "identifier", I would like to create a square for the values ​​in the columns "Freq", "Freq.1" and "Freq.2". However, at present, I can successfully build a single Y value - for example:

dataset <- read.csv("~/R/dataset.csv")
library(ggplot2)
p <- ggplot(dataset) 
p + geom_boxplot(aes(x=ID, y=Freq, color=mm))

I tried something like y = c (Freq, Freq.1, Freq.2), but this leads to the following:

Error: Aesthetics must either be length one, or the same length as the dataProblems:ID

I am sure this is a simple solution, but since I am very new to R, I can’t say if this is a problem with the wrong data format, the wrong syntax, the wrong package, or something else.

Any help would be greatly appreciated!