How long is the installation supposed to take

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## Context of the issue
Because mine first went for 10 min, deleted it then tried to install again and waited half an hour before deleting again. is it supposed to take that long?
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[the remaining entries are only necessary if you are reporting a bug]

## Process to reproduce the issue

[ordered list the process to finding and recreating the issue, example below]

1. User creates TPOT instance
2. User calls TPOT `fit()` function with training data
3. TPOT crashes with a `KeyError` after 5 generations

## Expected result

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## Current result

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## Possible fix

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## `name of issue` screenshot

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