I think she would be satisfied with legal. She certainly doesn't want it to be safe. At least not for the baby. And I doubt she wants it to be rare.
But, put her comments in another context, say, that of slavery. Imagine if Abraham Lincoln, in a bid to appease southerners had said, “I'm personally opposed to slavery, but I don't think the government should interfere with a slave-owner's right to choose. Let's keep slavery safe, legal, and rare.”
Abortion is every bit as evil as slavery ever was.
Hillary isn't safe. Her dealings aren't legal. And, unfortunately, she isn't rare.