50 Shades of Repetition

page/line

30.18  …his mouth a hard, impassive line.

62.14     His mouth presses into a hard line,…

71.32     Christian’s mouth presses into a hard line,…

75.33     His mouth sets in a grim line.

95.14     His mouth presses into a hard line.

102.6     My mouth presses in a hard line.

109.11  …his mouth presses into a hard line.

130.25   His mouth is a hard line.

147.29   His mouth presses in a hard line…

152.4     His mouth tightens into that hard line.

214.15    My mouth presses in a hard line.

235.9      My mouth presses into a hard line.

240.18   …his mouth in a grim line.

251.24    His mouth sets into a hard line.             

405.8      My mouth sets in a hard, grim line.

418.12    His mouth is set in a grim line,…

431.25   …and his mouth presses into a thin, hard line.

In a book of 514 pages--  on average, the same phrase every 30 pages.  

And don't pretend you don't know what book this is from.