Grep/zgrep: count matches across multiple files

grep_match_count.sh

# Count occurences of KEYWORD across all files named [something].log
# Flag: -src

# Credit: 
# https://superuser.com/questions/205591/show-the-matching-count-of-all-files-that-contain-a-word

grep -src KEYWORD *.log

# Example output:
# production.20201107.log:12
# production.20201108.log:0
# production.20201109.log:0
# production.20201110.log:0
# production.20201111.log:0
# production.20201112.log:21

# Zgrep: Count occurences of KEYWORD across gzipped files
# Same syntax

zgrep -src KEYWORD *.gz