Perhaps you should try some spelling variations:
"occasional prayerss, occasional prayers" » "occasional prayer, occasional prayers", "occasional papers, occasional prayers", "occasional proverbs, occasional prayers", "occasional poemss, occasional poems"
"occasional writers, occasional writer" » "occasional drivers, occasional writer", "occasional writings, occasional writer", "occasional letters, occasional writer", "occasional notess, occasional notes", "occasions writtens, occasions written"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"occasional prayerss, occasional prayers\") OR (\"occasional writers, occasional writer\"))*".
• Removing quotes may allow a broader search: (( occasional prayerss, occasional prayers ) OR ( occasional writers, occasional writer ))*.