--- a/www/HACKING.rst	Wed Sep 02 00:04:11 2020 +0300
+++ b/www/HACKING.rst	Sun Sep 06 09:47:02 2020 +0300
@@ -329,6 +329,11 @@
 
   $ sort -k 1nr,2 <$IN >$OUT
 
+https://www.wordandphrase.info/frequencyList.asp
+  Word frequency info based on COCA.
+https://www.english-corpora.org/coca/
+  COCA corpus with word frequency info.
+
 OANC frequency wordlist
 -----------------------