Bash - Function to check for an odd number of occurances of a string in a file

Bash - Function to check for an odd number of occurances of a string in a file

# $1 is the name of the element to search
# $2 is the file to search
function checkodd(){
  if [ $# -ne 2 ]; then
    echo "Please use the following format: checkodd <string to check> <location>"
  else
    for f in "$2"/* "$2"/**/* ; do
      if [ -f "$f" ]; then
        stringcount=$(grep -o $1 $f | wc -l)
        if [ $((stringcount % 2)) -eq 1 ]; then
          echo $stringcount' '$1': '$f
        fi
      fi
    done;
  fi
}