Consolidation of power in blockchain terms refers to a situation where a single entity or a small group of entities gain control over a significant portion of the blockchain's resources. This could include the majority of the network's hashing power or a large amount of the token supply.

Delegating voting power in blockchain refers to the ability of token holders to delegate their voting rights to another party who then votes on their behalf. This is typically done to increase the chance of a particular outcome or to reduce the cost of participating in the governance process.

In the case of Arbitrum blockchain, consolidation of power could occur if a single validator or a small group of validators were to control a majority of the network's validating power. Validators are responsible for validating transactions on the network and are rewarded for their work. In the case of a consolidation of power, these validators could potentially collude to manipulate the network's transaction processing or to control the outcome of governance decisions.

Delegating voting power in Arbitrum can be done through staking one's tokens and then choosing a validator to delegate to. The delegated validator can then vote on behalf of the delegator, with the delegator's voting power being added to that of the validator. This allows smaller token holders to participate in the governance process and have their voices heard, even if they don't have enough tokens to vote on their own.

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Most of the requested parts of the problems in this bounty are quite straightforward in terms of SQL coding. The most challenging part was identifying the top 10 delegators for each delegate in the top 50. The code that I have written might not look expert at all, since it is mostly redundant. For investigating the activity patterns of delegators, their most common activities have been illustrated, along with the most prevalent times for delegating transactions altogether.