Create a Go program to count the frequency of words in a string using a map.
MediumProblem Statement
Create a Go program to count the frequency of words in a string using a map.
Sample Input
A string (e.g., "Go is fun and Go is fast").
Sample Output
Word Frequencies: map[Go:2 is:2 fun:1 and:1 fast:1]
Limits
Time: 2s · Memory: 256 MB