Online dictionaries and grammars are likely to influence usage much more than their traditional Fowlerian counterparts ever did.

You will see the baby's head crowning during contractions, at which time you must prepare to assist the mother in the delivery of the baby.

For the German occupying authorities war thus appears to offer the most appropriate occasion for carrying out their policy of genocide.

What are the privileges and immunities of citizens of the United States here referred to [in the Privileges or Immunities Clause of the Fourteenth Amendment to the United States Constitution]? […] Among these we are safe in including those which in the Constitution are expressly secured to the people, either as against the action of the Federal or State governments. Included in these are the rights of freedom of speech, and the right peaceably to assemble. […] We find that Congress is forbidden to impair them by the first amendment, and the States are forbidden to impair them by the fourteenth amendment.