String occurrencies counter

A quick attempt to solve an assignment. Unfortunately i failed to complete the task in the due time but still I wanted to resolve it.

Assignment

Find first most occurring word within a string. Example, given the string "If you know the enemy and know yourself you need not fear the results of a hundred battles" the result should be the word "know"

First try

Since the short time at my disposal, my first attempt to solve this problem didn't account for an important detail: the 'first' most occurring word.

	public static string GetFirstMaxOccurringWord(string input)
	{
		var result = input.Split(' ')
			.GroupBy(w => w, (k, l) => new { Key = k, Count = l.Count() })
			.OrderByDescending(o => o.Count).FirstOrDefault()?.Key ?? string.Empty;
		return result;
	}

Second try

With a little more time I came to this second solution. While not very elegant, it does the trick:

	public static string GetFirstMaxOccurringWordRedux(string input)
	{
		var maxOccurencies = 0;
		var firstMaxWord = string.Empty;
		var bucket = new Dictionary<string, int>();
		foreach (var currentWord in input.Split(' '))
		{
			if (!bucket.ContainsKey(currentWord))
			{
				bucket.Add(currentWord, 1);
			}
			else
			{
				bucket[currentWord] += 1;
			}
			if (bucket[currentWord] > maxOccurencies)
			{
				maxOccurencies = bucket[currentWord];
				firstMaxWord = currentWord;
			}
		}
		return firstMaxWord;
	}