Sabrina,
There is no way to have the output of +d option presented in Excel format. The Excel spreadsheet is two dimensional with columns for words and rows for number of times that word is used by each speaker, i.e. one speaker per row. The +d option creates a three dimensional output with words, number of times that word is used and the line numbers each word is located on in a file. The only way to fit all of this into Excel output is to have each cell, which is an intersection of each word and speaker's row, consist of the number of times that word was used by that speaker along with all the line numbers that word occurs on. Then each cell will be very crowded with lots of text.
If, however, I misunderstood your question and you do not want to get +d option's output, then to create basic Excel output you would type command: