The ornamental design for a timer for brushingteeth, as shown and described.
FIG. 1 is a front elevational view of a timer for brushing teeth showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a second front elevational view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The structural features depicted by broken lines in the figures have been shown for the purpose of illustrating features of the timer for brushing teeth that form no part of the claimed design.
The toothbrush depicted by broken lines in FIG. 4 has been shown to illustrate environment that forms no part of the claimed design.
The portions of the left side of the timer for brushing teeth, not shown, form no part of the claimed design.