Perhaps you should try some spelling variations:
occasionally written » occasional writer, originally written
occasional prayers » occasional poems, occasional writer
occasions writtens » occasion written, occasions fitted
occasional papers » occasional paper, occasional poems, occasional verse

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( occasional papers, occasional prayers ) OR ((( occasions writtens, occasions written ) OR ( occasionally written, occasions written )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( occasional papers, occasional prayers ) or ((( occasions writtens, occasions written ) OR ( occasionally written, occasions written ))))".
• Adding a wildcard symbol may retrieve word variants: (( occasional papers, occasional prayers ) or ((( occasions writtens, occasions written ) OR ( occasionally written, occasions written ))))*.