Check if a line is composed by unique words.

check_unique.sh

# line number after ==
# change \\t with the delimiter you want to use instead of tab for splitting to words
words_count=$(awk 'NR==5{print}' data.csv | tr \\t \\n | wc -l)
unique_words_count=$(awk 'NR==5{print}' data.csv | tr \\t \\n | uniq | wc -l)

if [[ "$words_count" -ne "$unique_words_counts" ]]; then
    echo "Not unique"
else
    echo "Unique"