| 2026-05-21 | Fixate |
| 2025-12-25 | Stew (over) |
| 2025-03-25 | Have a bee in one's bonnet |
| 2021-09-27 | Dwell (on) |
| 2021-07-26 | Focus single-mindedly on something |
| 2021-02-19 | Hyperfocus |
| 2021-02-10 | Fixate |
| 2021-01-02 | Dwell (on) |
| 2019-04-28 | Fixate |
| 2018-03-03 | Become completely absorbed |
| 2018-01-10 | Think about only one thing |
| 2017-11-09 | Stew (over) |
| 2016-09-06 | Constantly worry |
| 2016-07-27 | Lose sleep (over) |
| 2015-12-21 | Worry compulsively |
| 2015-06-07 | Fixate (on) |
| 2015-02-09 | Preoccupy and then some |
| 2014-12-04 | Haunt |
| 2014-10-12 | Become fixated |
| 2013-09-28 | Become completely absorbed |
| 2012-10-25 | Have a fixation |
| 2011-09-12 | Keep thinking about, with "on" |
| 2009-09-03 | Dwell |
| 2008-05-22 | Preoccupy |
| 2007-09-17 | Dwell (on) |
| 2007-03-10 | Take hold of, in a way |
| 2006-07-12 | Have a one-track mind |
| 2005-11-17 | Preoccupy |
| 2001-12-01 | Dwell (on) |
| 2001-07-10 | Fixate (on) |
| 2001-05-03 | Haunt |
| 2000-06-13 | Haunt |
| 2000-05-28 | Haunt |
| 1999-10-07 | Preoccupy |
| 1999-05-03 | Can't stop thinking about something |
| 1998-01-11 | Haunt |
| 1996-05-05 | Haunt |
| 1995-06-06 | Preoccupy the mind of |
| 1995-06-02 | Preoccupy |