Frieda learns to make two-word utterances. Other people usually do not grasp the meanings of the words she utters, her parents often serve as translators. Considering these factors, Frieda's age would be about .

By 18 months

Explanation: Every toddler has his or her milestones in terms of growth and development . By 18 months, toddlers generally start  speaking only a few words even though they  understand many of about 50. Their utterances would be recognizable to  their parents and adults who  spend most time with them an these people will tend to serve as translators for outsiders who may not understand such child's utterances.

Frieda learns to make two-word utterances. Other people usually do not grasp the meanings of the words she utters, her parents often serve as translators. Considering these factors, Frieda's age would be about a typical  toddler in the 18 months range because at this age, toddlers start improving in terms of  few utterances.

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