linux count occurrences of string in file code example

Example 1: count occurrences of word in unix bash

$ grep -o -i needs inspire.txt | wc -l

Example 2: count occurrences of word in file linux

grep -wc "your_text" FileName

Example 3: grep ocurrences

Just use flag -m to define number of occurrences to match:
grep -m1 pattern file